I own the Core and my partner has had the Hub since launch. Too soon to comment on reliability of the Hub, but I used it while my Kickr was getting replaced (packed in after 700hrs? or so). I was really impressed. Not being quite as smooth when standing at lower power was the only thing I didn’t like, otherwise just a different feel. Perhaps only perceivable because of lots of time on the Kickr. Hairsplitting accuracy isn’t really a factor for me, just consistency.
That said, moving these things always feels risky and the Wahoo support was unbelievably good. Worth considering that aspect for travel. They sent me a new trainer to replace out of warranty unit immediately with no fuss when it started cutting out. If you can stretch I would say the uplift is worth it for the Core for that support alone.
Fwiw: I did a year working abroad and bought a £100 wheel-on to use with power meter. You just get used to it again and those things are hard to break!