Feel better soon. He's old, his time is coming soon anyway, no need to wish death on him.
I will say this though. If he were to pass away, the republican reaction to the vacant seat would be entirely different from what we're seeing right now with the Breyer seat. Yea some of the right wing senators are gonna light Jackson up during hearings but overall it's gonna be pretty smooth. A Thomas replacement would be pure warfare, and Biden will hopefully respond in kind by nominating a very liberal judge.