Flat mount discs - worth the wait and cost?

[Trek420]

I'm in the process of deciding on a gravel bike, my front runners being the Parlee Chebacco and Open U.P. Both of the current versions do not have flat mount disc brakes, and because of this post mount vs flat mount, I understand that Parlee frames might be going on sale soon. So the question is, should I buy now, potentially for less money, or wait for new models with flat mount compatibility? Is it much better? I'm new to this disc break game!!

I'm new to the disc brake thing too. The only bike I have with them is the recumbent tandem. So I don't really know enough to compare the two. The Chewbacca ... oops Chebacco looks sweet:

https://www.reddit.com/r/gravelcycli...e_chebacco_xd/