@repligate @emilaryd and i did a couple experiments on SL with 4.1 → 5 and our guess is that it is likely not the case that 5 shares a base w/ 4.1 (but this was very hacky / done in a couple hours)
more detailed results here https://t.co/SDDnDCTayR
more detailed results here https://t.co/SDDnDCTayR