Since it is free you should try it out and see if it meets your needs. I suspect you will find it is an excellent global editor, but if you need more advanced features like advanced denoise, selective editing involving masks, or point color, gradients, and so on, you would not be happy with nx studio alone. Then there is Lightroom's advanced organizing and library tools. Then the fact that the photography plan gives you photoshop. Which I couldn't do without. But maybe you never use photoshop, don't need much of an organizer, and want to do mostly global edits, then nxstudio would be fine.
If you hate subscriptions then dxo photolab does everything the lightroom develop module does, in some cases better than lightroom. It can be a complete freestanding replacement for lightroom if you don't need lightrooms organizer and didn't need photoshop.
Another option would be Photoshop Elements with the 3rd party elements+ plug-in. It is similar to lightroom and photoshop combined into one package.