I’ve updated my 4th gen 12.9” iPadPro to v17.4.1, the current version as I write this. Works fine. Don’t notice any differences in the speed of apps I use, nor battery life, nor anything else. I do like and use Stage Manager from time to time though when I’m heads down in a single app, usually ninox, I cancel it and focus on the one app.
Other than above, I do feel better about being on a currently-supported and theoretically safest version of iOS. Big thing for me: v17.4.1 works, works well, works about the same as with previous software, and I’m happy (and perhaps delusional) that I’ve got the security of the most recent software.
Side note: no interest in upgrading to any newer iPadPro at this time. No need to do so for my uses.