Good post, good story
I reckon there's a good chance you inspired your neighbour to go sly again.
He clearly enjoyed it previously and probably got bald envy

Yeah I think a lot of guys tried sly during the pandemic who ordinarily wouldn't have tried, or otherwise it gave them the excuse they had been waiting for 😊
Oddly enough for me I got out of routine during the pandemic, with WFH and young kids at home.
The year before the pandemic I had maintained a #2 buzzcut most of the time and shaved bald quite a few times. During the pandemic, I would grow it out for several months, then buzz it off, and then a few days after that I couldn't resist the urge to shave bald

and then it would start all over again.
Just post the pandemic I regretfully drifted back to conventional haircuts, but pleased to say that I've been buzzing again since the Spring.
That urge is coming, it's gonna happen one of these days...