Re: They're not alone
It looks as if some companies are just too slow / don't care.
MacOS has been nagging users that kernel extensions were deprecated and due to be removed for some time (I think I first noticed this more than a year ago). I've got Norton on one of my machines and a version compatible with Big Sur was only released on the day (or was it the day after) the OS update was made generally available - they could have sorted the problem with the Catalina version (so a year before it had to be done).
Apple have made a significant change to the OS security model (in a good way) and gave people lots of notice that adoption would become mandatory. Seems strange that security-related products have been "caught out" by this!