I started on Thingiverse, then copied everything over to Printables when it became available. The traffic difference between them is huge. I uploaded my models to Printables in March 2022, and my total downloads is just over 2K for all of them. On Thingiverse, I have 4K downloads in just the last 30 days.
I still post most things to both sites, but sometimes I get lazy or will “do it later” and just not.