I use them when I want to stream audio and can get by with them pretty well in conversation (much better than without), with or without Conversation Boost. My HL is mild/moderate, so I find them to be a reasonably effective alternative to HAs in that use case. For 200ish USD I manage my expectations.
The upcoming iOS 17 “adaptive audio” is yet another step towards HA-like functionality, where the APP2 can automatically switch to Conversation Boost when needed. It does help.
Another iOS 16+ feature that HA and APP2 users should take note of: Voice Isolation mic mode for phone calls. Apple brought this Facetime Audio feature to phone calling sometime last year, and it is very effective, such that I’ve abandoned my built-in hands-free mic in my car and the APP2 mics for phone calls. People on the other end can’t tell I’m in the car, even with 65 dB+ road noise at 70 mph, with my phone mounted to the dashboard close to face level. Look it up.