I have heard this sentiment elsewhere. I'm really hoping that the Mac Mini with 4 USBC ports and the Ethernet will do what I need it to if I decide to go that route.
Bass player and Ableton Live user here. Don’t run it live but use it for all my writing and recording. Latest version (10.1) is v reliable IME, I run it for hours a day without any crashes or lockups. Judging from the posts on the Ableton forums, the people who have trouble with it tend to be running older machines with previous gen two cores and relatively low RAM. It is not a super power-hungry piece of software but it's definitely better to max out the specs if you can. I reckon the new Mac Mini with mid to high end spec plus Thunderbolt 3 will be more than enough. BTW I use a UAD Arrow Thunderbolt 3 interface, which I'm very happy with. Would have no issues taking it on stage if I played out live. Dante looks interesting but the whole audio over Ethernet thing seems fairly new and oriented to large project studios not live performance (as far as I can see anyway) so don’t know if this would be a useful road to go down at this point. Worth exploring though.