When I was a young kid around 1980, I wanted a freewheel hub, because it seemed like all the "good" bikes had them.... I couldn't afford such a bike at the time, So I pulled my coaster brake hub apart to see how it worked... I found that if you just removed the arc-shaped brake shoes, it would freewheel... of course, it was still heavy and the forward engagement still sucked, but I still felt cool, and no more locking up the back wheel on hard landings 😁. Plus, there was no back-pedal when rolling in reverse! I also discovered that removing the arm that attached to the frame would allow you to engage in reverse (with the shoes still installed)... When I got into freestyle, I kept rear coaster brake mags around converted each way for tricks... then a few years later ACS came out with the RL Edge Hub, which behaved like a coaster brake hub without brake shoes, except better engagement (and they made an obnoxious, embarrassing moaning noise when coasting, lol). That was almost 35 years ago, so I'd imagine there are lots of perfected options nowadays...