You are right, the clans are now on their last legs, they are practically dead and few people want to play clanners, but as long as there are such people, then let's do it, why not?)
Of course, the past cannot be returned and there will definitely not be such activity as 10 years ago, but if we now doubt and think about whether to join the clan or not, then this will finally die.
P.S. There are no rules in my clan, you can come and go whenever you want (for example, Albus joined the AQUA clan for only one season of the Allround League).