Probably a couple of decades ago now, a semiconductor salesman said they didn't sell logic gates any more as a PIC processor was actually cheaper and for most things you could just program it up for whatever gate function you needed. That's only gotten sillier over the years so I suppose it shouldn't be a surprise that I don't see such designs any more.
Low end controllers have a built in resonator that whilst usually pretty good can be 10% out on clock speed. A bit higher end (probably means spending £1.50 ) and you can run off a 16MHz crystal and get the timing tight. Being able to control the duty cycle of the LED might be nice, you can flash brighter for a short time to keep the average power in check, with the short time making it more of a defined strobe.
A Pi is a rather different beast. You could NTP lock the timing to compensate the crystal, or even GPS lock the timings, but that seems a tad excessive. But then perhaps in the HiFi world a turntable strobe atomic clock locked via GPS PPS would have a market