In context of using these in addons they've been pretty much on their deprecated period since the TLS update added their special _addon suffixed version. What should be done is adding _main suffix to all of these to prevent issues caused by outdated addons that are still using these instead of _addon version. This would also prevent some potential false bug reports. Don't think there is a single addon that actually requires using those files and if there is they will simply have to change their name by adding _main suffix to them. This suggestion would require Valve to do it changing the code to search for _main suffixed version of those files.
Suggestion
In context of using these in addons they've been pretty much on their deprecated period since the TLS update added their special
_addonsuffixed version. What should be done is adding_mainsuffix to all of these to prevent issues caused by outdated addons that are still using these instead of_addonversion. This would also prevent some potential false bug reports. Don't think there is a single addon that actually requires using those files and if there is they will simply have to change their name by adding_mainsuffix to them. This suggestion would require Valve to do it changing the code to search for _main suffixed version of those files.