I am doing more running instead. Especially hill running, and now trying some ultramarathons. Which can be kind of similar to audax.
Its a way of going to new places, and scenery you wouldn't get from the road.
Also feels simpler - less faff wth equipment, or expensive bike parts wearing out. Though you can spend lots of money on fancy ultrarunning clothes, shoes, bags etc if you want...
Still doing a bit of cycling, for commuting, and just getting around, and sometimes getting to the start of runs. Would like to do some touring this summer. And maybe I'll have a go at a 200km audax sometime.