[spindritf]

Also, strike-through. Which is the one I find genuinely useful because I like the suggestive way to say s̶o̶m̶e̶t̶h̶i̶n̶g̶ then visibly correcting to something else.

http://adamvarga.com/strike/

[endgame]

People have written ^H and ^W since forever^W^Wfor a very long timg.

[spindritf]

Those are lost on many people nowadays. And strike through imho looks better.