Fusion does many, if not most, of their 1911 assemblies in 10mm. I don't think that's the way to go, as one of the advantages of 10mm is the capacity. I'm NOT a big 'capacity' guy, and carry 6+1, 8+1 and 10+1 with no concerns. But, if you are attracted to 10mm for carry, then to me one might as well take advantage of its advantages. Not that I would love to have a CCO platform in 10...just no practical reason for me to do. I may still, anyway.
The EAA Witness Hunter is one I'm personally familiar with, and the point of mentioning it is that it's 1) all steel, and 2) does 15+1 in a frame that feels about like a 1911 to me. Yes, it's thicker. But it's not more than 1/8" thicker, I don't believe (if that much).
Everyone whines about 10mm factory ammo, and justifiably. It's utterly useless if you're talking about mainstream factory. Well, I mean utterly pointless, not useless. It's fun to shoot, and, when ammo is available, not much more expensive than many others. But, I handload and can't imagine shooting any factory ammo in any caliber except .22, so there's where 10 really comes on. And it doesn't have to be loaded until something breaks to prove itself. It's the only thing I've been shooting for almost a year now--it's The One. In my experience, it can be loaded to produce a round that's super accurate far more easily than 40SW can, and if you haven't experienced full up loads in the little Glock 29 and seen the Wonder, you're really missing something quite extraordinary. I'm not a Glock fan. The G29 seems to defy physics as we know it. Yup...it's that good.