I've thought about this for a long time but finally got a chance to explore it more. It 100% works, is extremely practical, and the best part is nobody knows about it (but they might now.) This is a very dirty way to close out rounds since most people won't be thinking of the "sliver of life" trick after drive reversal.
Technically this works on anything that deals grey life, but so far the only thing in the game that does grey life is Drive Reversal. Only the corrosponding player can absorb grey life like Zangief stand HP, Marisa Gladius, etc.
Also included at the end, a drive reversal tier list me and Greentea compiled months ago. The numbers are confusing, the first number is the most important number. It can get deeper because some drive reversals push the character very forward (I know Rashid/Blanka are there) which can get huge 8f punishes like Ryu back HP, Luke crouch HP and more. I may do a video on that next time, after Ed is released just in case nothing big changes. Nobody really dived deep into drive reversal just because its more incentivized to go for drive rush and OD stuff than to use it. Half the time it doesn't work the way its intended due to its slow speed.
Heads up, likely won't do an Ed hitbox video, too time consuming. Please tune into the good people at https://ultimateframedata.com/sf6/ when they show Ed's info, it's a great resource.
Will also update people on Luke once the patch comes out.