Discussion on this very topic over on this thread.
I paid for a vanilla FS2024 sim yet I’m getting a weird hybrid sim instead with no method of returning it to defaults to check it out. The FS2020 add ons are not even confirmed to work, they are only confirmed to load ok into the sim. Also aircraft ported in blindly from FS2020 are listed in the choose aircraft section, but have no indication that they are 2020 aircraft.
I have many old add ons some that I haven’t used in 3 years all imported and enabled in FS2024!
It’s a shambolic mess.
If they won’t let us disable FS2020 content (as we currently have the marketplace disabled, side note: why does it have to be done in there?) then they need to pull all FS2020 ASAP.