JETBEAM T4 PRO, OLIGHT R50 SEEKER, MAEERXU M8: notice any similarities?

These 3 lights seem to share similar dna and I wanted to know if there was a trend towards manufacturers developing lights along the same lines when there’s a trend. Or is it just coincidence they came out around the same time, use the same battery, and have the same body style with integrated charge port.

Before I start a new thread, where’s Maeerxu these days? Do they manufacture for other companies?

Lastly, before I post a wtb thread, who’s got a t4 pro for sale?