One problem with grassy lines is that when you need to temporarily use replacement buses (like in cases of issues with the electricity or maintenance, etc.) they can't drive on the lines and have to take the regular roads with the cars.
At the moment one tram line in my city has been interrupted for a few weeks and that's how I noticed that the grassy line was making things more complicated for the buses that are used instead.
I think that's one reason why most cities only put a few sections with grass.

Let's say the office worker who is 27 internationally today was born in December 1995. He was 1 at his birth, turned 2 in January 1996 (Korean age). In January 2023 he turned 29 and will turn 30 in January 2024, but internationally he'll turn 28 in December 2023.

I, for one, am looking forward to the zombie apocalypse that will result from this.

Yeah, I first took a look at lemmy and others a few weeks ago, when everyone was asking "what's an alternative?" and at the time, despite so many people talking about the fediverse, there weren't that many people or threads. And now look how active some communities are becoming!