Why not Singapore? The tech scene there is amazing and inspiring, (too?) Warm, diverse, and very good public transportation. Heck, you can walk though neighborhoods if you fancy some sweating.
Unfortunately it's a little bit too car-centric despite the expensive prices of cars, and I find the culture to be a little bit "unhinged".
Singapore is pretty awful for LGBTQ rights, no? OP didn't mention it but it's the reason I would never consider living there despite having heard nice things.
> In June 2019, at the Smart Nation Summit, Prime Minister Lee Hsien Loong reiterated that Singapore would keep Section 377A "for some time" saying, "Whatever your sexual orientation is, you're welcome to come and work in Singapore... You know our rules in Singapore. It is the way this society is: We are not like San Francisco, neither are we like some countries in the Middle East. [We are] something in between, it is the way the society is."[13][14]
It's a place I've considered for sure but I've already spent five years in Tokyo so looking more outside Asia. (I know, I know, painting with a very broad brush here but yeah)
Unfortunately it's a little bit too car-centric despite the expensive prices of cars, and I find the culture to be a little bit "unhinged".