Software that doesn't add anything value and/or isn't needed for hardware operation = bloatware.
Like i said, GeForce Experience isn't needed to use the GPU, hence why i consider it as bloatware. Same goes for MoBo utility programs. E.g for MSI MoBo, Dragon Center (used to be named MSI Command Center).
For GPU drivers, getting the latest may not be a good idea. As said above, you may get bad driver version, messing up your system.
I haven't updated my GPU drivers for years, since "if it ain't broke, don't fix it". Currently running Nvidia v531.79 drivers, while the latest is v536.67.
And i'm not lazy enough to let others decide when and what to update in my system. Instead, i like to be on top, knowing very well what is going on in my build.
Btw, if you close GeForce Experience, it actually still remains running as background process. Sure, you can't see that from Task Manager, instead you need to use power user tools to see what is going on (e.g Process Explorer).
For other "utilities" offered by GeForce Experience, there are better programs. E.g for screen/gameplay capture, i use OBS.
In the end, preferences differ.
Catalyst it was/is.
Even i haven't had recent experience with Radeon GPUs. Latest/newest for me is Club3D HD 7770 Ghz Edition (living in my old AMD build).