Hey all,
Just thought I would share my OCLP experience here. I have a late 2015, 27" iMac and Monterey is the last officially supported OS for this Mac. I've tried OCLP a few times with Sonoma, and Ventura, and while it's an overall nice experience with this mac, there are a few things I ran into that would affect this being a long term solution.
1. 3D acceleration doesn't work in Virtual machines on this particular Mac with OCLP because of the patched graphics drivers.
2. Protected videos don't play in HD+, and also some sites such as Disney+ don't work in Safari. Neither are a big deal to me personally, as I would prefer using an HDR supported device to watch content as well as my 5.1 sound system. However, mentioning this for those who do like to watch their content on their mac.
3. Had some iCloud / Apple ID related issues e.g. the Mac wouldn't sign out correctly and had to force it out of my account after signing in with a supported OS, and do a clean install / login. Beyond those items mentioned OCLP was a fairly stable solution for the daily tasks.
However, the other challenge for me is, while I could simply get a new M series Mac and call it a day, I prefer the X86 platform for backwards compatibility, and switching to Apple's new platform would get rid of almost all my options there.
So, I've considered the following for the time being: Stay on Monterey until I'm forced to upgrade. If I need newer, I can stick Sonoma in a VM with Fusion, and use the typical daily stuff that would require a newer OS. For legacy support, run a copy of Mojave, or one of the Sierras from an external drive for 32 bit support (older DOS games, etc) not updated to run on modern systems.
At the end of the day, I really like OCLP as a concept, but I think in practice there are too many variables to take into account to make it a perfect solution for everyone's specific needs that a supported OS would provide.