Steven is warming up to, of all things, Shukufuku no Capanella. This got me remembering if there were many shows that teetered at the brink but made themselves accepted, with R > 1.

Shingu was one of these. It clearly was well made, and I do not even remember precisely what my objections were. Setsuna, yes. But it was such a great anime, that it was really silly to hang up on details. It was inevitable for it to take its rightful place in the pantheon.

Sunred is another example. It's not a Shingu caliber show, and I actually dropped it at first. But these days I rewatch it often, for things like the Sunred's walk in the rain in ep.13 (I even identified every location of the walk by using Google Street View and created a custom map).

But nothing else comes to mind. It does not happen often.