Pros and Cons of adding 4-8 player maps at the Pro 1v1 level?

I am a Dinosaur so I remember Big Game Hunters in the original Starcraft, the ultimate 8 player map.

So I was watching a pro game today on that new map pool map that is a 3 player one and I was thinking...

It'd be nuts to see like Hero versus Serrell on a massive l8 player map...or even 4 or 6.

The scouting, just the size too I dunno. Would be cool too if they upped the supply to 300 or 400 based on map size.

I huge 10 player map 1 v 1 Clem v Serrell with 1000 supply.

I can see some pros and cons in terms of gameplay and all that.

Wondering though why even 4 spawn maps aren't used and if there has been any chatter of like 50 spawn 1 v 1 marathon maps with 5000 supply armies etc.

Again could be pretty cool...