i agree but i doubt any company will invest the cash into UL listing a new 4-wire LED device just for service stock though. they’ll just keep the old line alive until their orders get so low they can no longer justify it and force customers with 20 year old nac’s to upgrade or find another solution.
i can’t think of a single reason why anyone would’ve chosen a 4 wire horn/strobe over a 2 wire one in a new installation in the past 15 years. unless they just absolutely felt the need to double their wire for no reason… any ideas?