This question relates to the thought process, technical but also philosophical.
For example, does one start with the current gear they have (say body and lenses) to pursue the photography of interest (wildlife, nature, landscapes, portrait etc)? If you are unable to achieve what you are looking for how do you know its a technology issue and not a lack of skill? Some things are obvious- faster lenses, longer reach etc. For reference, I have no formal photography training, just learning as I go and I enjoy the hobby.
What about camera bodies?
It seems like most people here are shooting with pro level/top end bodies. I'm assuming many here are professionals. For those who are not pros or make money from your photography (a hobbyist) what criteria/reasoning do you use to upgrade? Do you buy the most advanced camera you can afford in hopes that the technology will last the longest? Do you let your wallet decide? Do you always buy the best?
How did you learn when your photography skills were holding you back and when your technology (say sensor resolution or autofocus speed for wildlife) were holding you back? Thanks for sharing.
Date the camera, marry the glass as Steve says, and let me say that is so so true.
Camera Gear are nothing but tools.
90% of what you achieve comes from you.
Not everyone can truly say they have completely outgrown the capability of the camera their using.
New technology brings new feature new tools, if they enhance or help achieve things easier or resolve specific issues or meet your needs then that's fit for purpose.
Example:
The reason i upgraded my D3X to a D850 was mainly i needed a tilt screen, yes a tilt screen as doing waterfall shots laying on a rock in the middle of a running stream in Tasmania's wilderness was a challenge with the D3X not having one.
The D850 tool brought with it the option of a grip offering 9 FPS, plus some additional resolution, ok its not a D5 but gee at 9 fps and now 45mp, a tilt screen, with iso good to 12800 in my area, hello i could now use a tool that could do everything really well, so i sold the D5 and got a second D850. At 9 fps is enough speed it covers most needs.............what changed was not my photography but simply the tools used to help achieve different outcomes.
Haven't looked back since, mind you for known super high iso needs in really challenging low light conditions with blistering strong stickiness in tracking the rented D6 tool was and in many cases for me is still king especially at higher than 12800 iso.
Along comes the Z9 i sold recently after 2 years for a Z8, subject to the specifications of the pending Z7III the Z8 may be traded in for a Z7III, yes i am going backwards not forwards, why is the question, the Z8 is excellent but not the tool i specifically need to meet my current needs,
i do more 4 to 5 day hikes, or a lot more traveling so weight and size is paramount, other than that i don't need 20fps RAW with 3 D eye tracking as much or as often as first thought.
If tracking was super super critical all the time i would rent or buy Canon.
My needs are light small, prefer high resolution to reduce some dependency on longer glass, tilt screen, 5 -12 FPS at most is plenty, ISO to max 12800 is plenty. What tool fits that, is the Z7III and what light compact good glass can i add to that is important.
If i use my 300 2.8 VR II at F2.8, (not for Hiking LOL ) i find the image outcomes are
almost indistinguishable be it the D3X DF D5 D6 D850 Z8 Z9
after all 90% of what you achieve comes from you, that said we are all using fundamentally just a combination of time light and speed to make a photograph.
New gear high end gear can make things easier or faster to achieve certain results, there just different tools, but ultimately you don't buy a photo you make it.
When you look through your album's and have to check the info to see what lens or camera you used as you couldn't tell looking at the photograph, tells you something.
Mirror less tools have introduced some serious advancements, especially in costs and
especially in 3 D tracking and speeds which benefit people greatly that need those tools.
Mirror less has also been supported with great glass, as well as ushering the industry into the videography market.
See the gear as nothing but tools to meet certain needs, specifically or all round.
The latest and most expensive is not always the greatest, especially if your skill sets are not on par.
Only;y an opinion