B1 Pro

There isn't a B1, only B1 Pro(?). (Unlike, for example, C1 and C1 Pro.) The typing experience will be influenced by the 2RO (missing NKRO (and missing 6KRO for that matter)). It is based on ZMK (not QMK), and the source code was finally released on 2025-01-18 (due the Keychron's usual glacial speed

The severe key roll-over problems make the B1 Pro unsuitable for gaming More important is probably that the B1 Pro is (effectively) a rubber dome/membrane keyboard and thus has severe NKRO problems. The "severe" part of it is caused by Keychron's design of the keyboard matrix. See for example, Keych

What keyboard(s)? 75%: B1 Pro (rubber dome with severe NKRO problems (only 2KRO)) 70%: Q65 Max, K14, Q7, K14 Pro, and Q65 Max. 80%: Q1, Q1 Max, Q1 Pro, V1, V1 Max, Lemokey P1, Lemokey P1 HE, Lemokey L5 HE, Lemokey X4, K3 Pro, K3 Max, K2 Pro, K2 Max, S1, Q1 HE, K2 Pro, K2 HE, and K3 Pro. Though the K