I am a long time Linux desktop user (20+ years) but am still forced to keep a copy of windows around to use Adobe Acrobat for filling and signing forms. I have tried various Linux pdf applications (including commercial ones), using Adobe Acrobat via wine/crossover but haven't found a solution that works across the board. That is the only holdout from not having to interact with windows/mac.
Even if you are using windows, there is no reason to subject yourself to the bin fire that is Acrobat. Literally[0] every single other PDF program is better, faster, cheaper, easier to use than acrobat. Plus many of them don't randomly crash and burn half your CPU usage until you kill them like acrobat does.
[0] No, clearly I haven't actually tried all them, don't be so pedantic.
Reading PDFs is no problem, I use `evince` since ~15 years and it does the job.
I _very_ regularly have to sign documents though, and as OP said, nothing beats Adobe for that. I even pay the subscription so that I can have it on my phone, sign on the go, etc.
I use Okular for work, first on Linux for a long time and now on Windows, works superbly for signing/annotating PDFs and can be installed via package manager on either system (APT or Winget)
