That's not exactly correct. If you drop Lightroom later, you don't lose the edits you have already made and you don't lose the catalog. You do lose the ability to make additional edits to those same images and you don't have access to any of the new or changed editing tools and settings.I am coming rather late to this forum, but the question is still valid, so my input may help.
I do NOT like the rental basis of Adobe. If you stop renting, you lose the edits in LR. That concerned me.
Capture One has a migration tool that enables you to keep all the important edits when transferring to C1. I used it. It takes ages to run, but you only do it once.
I also found that the catalogue system in C1 was slow to load. To compensate, I transferred my LR catalogue in stages and created a new C1 catalogue at each stage. I now have several catalogues I can switch between at will. This is a good opportunity to review your images and do a cull! The latest version of C1 handles catalogues more quickly.
C1 has both rental and a buy-it-once options. I chose the latter, which includes all the updates for the year. Every 2 years I upgrade to the latest version. Discounts are offered, so the expense comes out at less than the rental model that Adobe uses.
In practice, the learning curve is steep, but well worth it. It is so much more powerful than LR. As it uses layers (up to 16) it is much more versatile than LR and has largely eliminated the need for PS for single images.
When I have to use a PS alternative, I use Affinity Photo (combining images, sky replacement and the like). As I recall, this cost about £27 as they run half price offers every so often. Affinity is powerful with the added bonus that very good tutorials are available.
Printing? I print directly out of C1. Not a problem.
I have never regretted the switch out of Adobe.
I hope my experiences are helpful.
Editing tools involve very individual and personal choices. What works for me may not work for someone else. For me, Lightroom Classic combined with Photo Mechanic works very well. This morning I edited 130 images in less than two hours in LR - each individually cropped with white balance adjustments.