If the sites that use Disqus today were willing to pay for an alternative, I would personally offer hosting of such, with fast load times and no tracking. However, I don't believe such willingness exists, and people are getting conditioned to accept sluggish load times and tracking. Too bad. Self hosted Open Source solutions are the second best alternative - management gets the illusion that the thing is free, and you actually get fast load times and no tracking.
I find it very hard to get worked up about 200k and 3 seconds of nonblocking load.
The tracking is of more immediate concern, but you also have to make a choice as a site owner:
1. Host your own comments. Nobody does this anymore because nobody likes registering for every site out there. You can have anonymous commenting, but ++ abuse. Either way, spam concerns are completely on your shoulders, and you still have to moderate.
2. Shell out to Disqus or similar. People get to log in with the credentials they already have (and don't have to log in at all if they have cookies from using another Disqus site), moderation is still a thing, but spam is much less of a problem.
3. Not have comments at all. An increasingly popular option.
That's a lot. Because Disqus doesn't generally load when the page does.
You have the time the user is reading to load it, but generally Disqus doesn't load till it comes into view.
* In 5 years time, large organizations (e.g. NY Times) will look far more into self-hosted, often open sourced alternatives. Maybe now, they post to twitter, soon they'll refer users to their own mastodon instance. Now, orgs host comments on disqus, in the future self-hosted platforms like Commento will be used. In some ways, it will go back to the independent way in which things operated back in the late 90s/early 2000s; though hopefully better in other ways. That's my prediction.
On the other hand, a repo history is normally immutable (with force pushes on rare occasions), and comment spam is way to common. Do you really a repo with all the usual link spam in its commit history? In case of public hosting it may trigger some spam filtering automation and block the repo/account. While perfectly possible, I'm not sure a DVCS repository is a well-matching concept for storage here.