Normally the technology stack refers to the languages and frameworks underpinning the project.
It is very weird to be in a situation where (for example) we’re working on a project in python and one person refuses to use python. Weird enough that I’ve never seen anyone with a personal tech stack, most people just try to adopt the local custom of the team they’re hired into.
In my previous job, I was hired into a team of tech leads, each in their own field. In the current job, I was hired into a product team that was about a macOS app. After several reorgs, mergers and downsizing, the team is mostly web devs, backend devs (Go) and me, still developing the macOS app.
Why should I care about the teams’ other tech stacks (and vice versa)?
I understand now. In my terms, you're a team of one who happens to be sitting next to another team, maybe under the same manager. That sucks, I feel for you.
It is very weird to be in a situation where (for example) we’re working on a project in python and one person refuses to use python. Weird enough that I’ve never seen anyone with a personal tech stack, most people just try to adopt the local custom of the team they’re hired into.