What do you use instead of TeamViewer?

Question

VNC

TeamViewer in recent years has become, if not a corporate standard, then definitely a mass and consumer one. Like Skype. For a long time, the Germans made it possible to use the old versions (although not so obvious, but the link to their site was in the search) and everything worked like clockwork.
But everything is changing. Those who use TV ran into trouble: at first, annoying warnings about the termination of older versions began to appear. Now here's a new one: we introduced a session limit for older versions - 5 minutes. Obviously, they will say go to the latest, 14th version. But, firstly, it does not work on everything (for example, on my old iMac, which no longer has the latest OS X, like on many versions of Linux), and secondly, the 14th is scolded: it crashes, is heavy, etc. .P.
So the question is: Who uses what instead of teamviewer? Especially for communication with users. It is obvious that RDP is not offered, although if you have peer-to-peer vpn clients , you can also do it. The main thing is that it works in two clicks.