On the other side of the coin, large electric pressure cookers get kind of enormous. If you use your immersion circulator to do large batches, like 30 individual cheesecakes for a party or large cuts of meat, you’ll run out of room very quickly, which means batches which would take forever. Whereas an immersion circulator can be stuck in a cooler or even the bathtub and cook a lot of food at once. A small pressure cooker and an immersion circulator is a lot less space than a large pressure cooker. If you only ever cook for a few people a combo unit would be fine, but I find myself pulling out the immersion circulator much more often for events.
I say this as someone who bought a large pressure cooker because it was a really good deal and now struggles to store it, lol.
Yeah, I think the ones my friends have are about that size. I wound up with the next size up and it’s just obnoxiously large so I try to warn people, lol.