most of the boutique synth makers which is everyone except korg roland and yamaha… hated going to namm because it’s a big expensive loud annoying place to be and synth stuff is often like a 3rd wheel compared to the halls and halls of guitar shit.
so, a lot of them started skipping it when superbooth became a thing. that and Knobcon became the 2 shows that people focused on more… especially modular people.
moog, sequential circuits and some others will probably go to NAMM but thye have bigger budgets so can afford the cost of having a booth.
fwiw a booth can cost $15,000 just for the table space. so, often several smaller companies would band together and share a big booth to cut down on the cost. it’s ridiculously expensive and anaheim is shit… most decided they’d rather go to superbooth and hang out w/their synth friends in a cool city like berlin.