again it is true that you might never need that much lanes or power but i do highly suggest stay away from X299 this year at least
not just overheating but many other problems and issues arise (from own experince and others)
i was going to upgrade myself to X299 But after all the reports and such i decided to not
but still needing alot of power myself i decided to go with Threadripper
and i will say i dont regret it at all
but like i said earlyier
wait a bit if you really can
save some more money and come back to the topic after the newer stuff is out and all the older stuff is more optimised
then re ask the question.