It would be great if you think you want to pursue work that needs that envelope. If you aren’t looking to do that type work then you end up with a bulkier, slower machine. Bigger parts need more infrastructure. Forklift, floor space or other storage area, hoist or crane maybe. If that’s the direction you want your operation to go then it’s appropriate. Otherwise it’s a poor choice.
Not even talking about heavy forklift kinda parts... but you still get lots of big circles to cut out of plate, or some kind of aluminum panel or electronics mounting plate thats just little too big in X or Y. Long skinny parts that are over 30", etc etc.
Talking from experience here. At least half or work is prototype work and you never know what will show up. We see the limits of our 40x20 all the time, even on parts that are less then 10 lbs. Honestly a 60x30 would be even better for this type of work, but size/cost/hassle goes through the roof with that lol.
Doing plate work on the table is pretty much a requirement for first machine too. If thats an issue with a brother it would make me think twice for the first machine.