I'm pretty disappointed by the new mbp and the state of Mac in general for several reasons. I've made pretty significant investments in the Mac ecosystem. I bought a semi pro sound card(uad Apollo 8) tons of software audio related plugins and logic and I don't have a lot of confidence that when it's time to replace my 2014 mbp that there will be a viable Mac option to replace it with. That immediately makes my sound card useless (thunderbolt connection) and unless there's a Windows version of the plugins (most do have this) then I'm out that money as well. I'm already looking at having a dongle if I want to use the new mbp with a thunderbolt connection which feels like a hack. Maybe this seems like first world problems but I bought into Mac on the promise that they truly supported the "pro" community. It's looking more and more like Tim Cook and company have forgotten that.
I think you probably mean Thunderbolt, or maybe Firewire, and not Lightning, yes? Lightning is the connector found on iPhones.
I don't remember people complaining this much about adapters when the Firewire 800 port was a different form factor than the Firewire 400 port that came before it - most of the equipment that plugged into it was "pro" level hardware like you mention.
Wait, can't you just buy a dongle to convert from USB-c to Thunderbolt 2 and continue to use your nice (I'm jealous, personally) UAD Apollo 8 with a 2016+ MBP?
I totally could and definitely would do so if the port changes stick and I decided to stay Mac. I'm more just irritated that I bought a Mac specific interface and they changed the port less than 1 year later.