Forgive me as some content I'm posting may not relate to Mojo₂, but I noticed a Hugo₂ question so I wanted to share my thoughts since I have real-world experience with this issue (only a handful have experience), not just theory. It may be of interest too to some as the Mojo₂ is a gateway drug to the Hugo₂. I moved on from the Hugo₂ thread since my project is complete and I want to stay discipline staying away from that thread so I hope you understand. I like to focus on future projects, not past projects. I'll try to keep the posts related to Hugo₂ short and concise.
I did want to be a Mojo₂ lemming, but it doesn't have a ADC and RCA output. Dealbreakers. For absolute SQ, RCA is the only way to go if you have premium cables. I'm not talking about the glorified AliExpress OEM (PWAudio, Effect, Brise, Norne, Double Helix, etc.) cables everyone uses but the cables only available from true craftsmen in the trade that control their own supply chain not glorified cable assemblers.
Post-pandemic for travel / commute, I'm more concerned with isolation than SQ. Especially since I'm more into convergence (videos, audiobooks, lossy) than critical listening while on the road. The travel / commute environment is just not conducive for critical listening, too many distractions.
I'm a bit of a Germaphobe too so I need to consider what I need to disinfect and to keep the smartphone far away from my voice. As some of you know, smartphones are full of germs (as much as a toilet seat) so I need a external microphone. I cannot wear ear tips so that rules out Airpods w/ mic.
So my current project is to build a sound dampening headphone that's extremly comfortable with ear gels and cotton padding. The head strap is comfortable as well. And now it has a external microphone so I can receieve / make phone - video calls.
I use the methods of Car Audio to sound dampen the headphone while wearing over CIEMs, so I can have better isolation for listening and phone / video calls. I H8 Universal IEMs and Headphones on the comfort side so only CIEMs will do.
If a future Mojo can handle this task of a microphone input (ADC), I'll be in Mobile Joy. Since Rob Watts is working on the Davina (ADC), may be slight slight chance an ADC will be incorporated into a Mojo one day.