With an older user, on a non FSE site, I noticed that the "Switch to Classic" button is missing in the help area. There's still an option on the more menu in the Editor.

Expected:

Just a heads up for whoever picks this up, the code for this on the frontend currently lives here:
It'd be nice to put those checks into the isOptInEnabled selector or even on the backend.
Backend please, see PCYsg-hNB-p2 for context. We can probably at least clean up the check @noahtallen noted above since FSE is targeting a different set of themes.
Related is also https://github.com/Automattic/wp-calypso/issues/35794
This has been fixed somewhere along the way, no longer an issue.
yay, cleaning up code resolved an old issue!