A few observations from someone who's been out of DXC for a few years.
To those who're talking about Karma, or "Eat S**t, Mikey". There's no Karma in him walking away with a personal fortune that's probably into 9 figures. He doesn't care at this point - he can retire with more money in the bank than most folks would manage to see in several lifetimes. He's got there by destroying what was a reasonably good company; he's got there by treating employees badly; he's got there by taking DXC from >$16Bn to < $5BN market cap in a few short years.
If he goes at the end of this year: DXC isn't going to magically grow back to where it was before. Its reputation with clients and potential employees is ruined. It has no people to support delivery, 'cause Mikey got rid of them all. It has no meaningful IP. It acquired Virtual Clarity (which has great IP and people) and destroyed it. Anything good has been destroyed over the last few years.
Whoever takes over, the best you can hope for is gradual stabilization and maybe some small improvements over the next 5 years. Maybe. IMO, the reputational damage done is so great that there's no obvious way back. The lack of delivery capability, coupled with contracts that can never be profitable, means it would take even a truly great CEO several years to build this company back up. It'll be a miracle if DXC doesn't end up filing for Chapter 11 in the next five years.