This is probably a stupid question, I've been hearing a lot about how 9th Edition calls for smaller play areas (and all that that implies), but isnt the wording "minimum"? As in 44"x30" is the minimum
for a Patrol/Incursion, 44"x60" minimum
for Strike Force etc? Whats to stop people from playing larger tables?
Yes, table size is a minimum value. As has been pointed out, this is GW
attempting to get people to play with the cardboard tiles they've made for Kill Team, so they can try to make more money out of people.
Admittedly, they might want to sell more than one style of reversable board for anyone sensible to take them seriously, but there you go.
And then you have the tournament tryhards on the playtest team which had mats for sale at the new minimum sizes suspiciously quickly - and who will push for people to use these sizes in their events so they can try to shift their stock.
Point being, you and your group should play with the board sizes you have and feel comfortable with - if that means playing a 1,000 point game on a 6x4, gopher it, so long as you're taking appropriate precautions given the ongoing global situation, of course.