Not my blog, but the author’s experience reminded me of my own frustrations with Microsoft GitHub.
When she says it’s starting to feel like legacy software, I think she means parts of it seem to be falling into disrepair. Some things that once worked consistently and easily, like using the browser’s built-in search, no longer do.
But you can still understand the gist of the article even if it used that word differently.
The author’s made at a new tech breaking an old feature. Seems more to me like a “I wish they kept things the same” than “I wish they changed some stuff around here”. Quite the opposite of legacy.
It being the main point of the article bug being used incorrectly in the title is just confusing. That’s comparable to somebody always mentioning “wolf” in an article, actually describing a hare and never saying what their definition of a wolf is.
Techical terms with specific meanings don’t vary significantly based on context, because consistency is important in technical usage.
The author is complaining about how guthub is being poorly modernized, which is the opposite of legacy software. If she means ‘something we choose use out of tradition’ that isn’t what legacy software means.