It's better sticking with the old players

It's good to mix the mixers sometimes that's why.
I have seen about a half a dozen new "players" but most have ended up exit scamming in a space of less than a year because most have no reputation they have built at all, so exit scamming is an easy road from them as soon as they receive a huge amount of BTC from a victim.
If a new player is appears, it better to wait for a long time until their reputation grows to an extent where chances of exit scamming are so low
If we need to wait "a long time" before using a mixer, before its reputation is done, then not any mixer could sustain and couldn't progress anyway. All mixers start with zero reputation, including Chipmixer. The service started from scratch.
It's just some are smarter than others when marketing their site (and advertising on bitcointalk is not necessary the 1st place to market a service)
This is also why a lot close their service: low traffic, low activity, so low revenue and then decide to scam (not all do that by the way)
More Bitcoin mixers we have, better it is for everybody, for Bitcoin and some niches too. All desnerve a chance to prove that they can be reliable.