I have no writing on drivechains, but I won't be considering them until mining is more decentralized. Hopefully Stratum v2 will help this along, then I can consider putting more economic weight onto mining. The mining ecosystem seems ripe for State capture with the trend toward centralization (look at the three biggest mining pools). Adding drivechains now, (which enable "crypto" tokens, to my understanding) seems like it would draw more attention from the State, given all the recent crack down on crypto more broadly. Landing Sv2 can help disperse the mining risk before we add some other reason for the State to crack down. Maybe in a decade, I would consider drivechains seriously and do more research. For now, I am crunched for time and bandwidth so plan to focus on things I can build now that are helpful.