The drive to win a market by accumulating customer market share is no longer the main drive behind business ventures in our economy. It has been replaced with the drive to increase equities market valuation. This, at times, contradicts accumulating or retaining customer market share.

Not many people are interested in providing investment funding a meaningful competitor to GitHub. There are sexier, bigger bets out there than "providing a place for version control software to be hosted". The people who are frustrated enough with GitHub to self-host have the ability to do so. The rest of us just get up from our desks, go for a coffee break/walk, and wait it out, because migrating to self-hosted is a PITA and not a core business competency.

They'll keep having outages, and most will keep paying for it. If they're paying for it despite fewer resources being spent on uptime, that means the company's more valuable as an equities market participant. Line go up.