Debian Stable currently ships Python 3.7. If that's what you want, great.
But if you want Python 3.8, the soon-to-be-released Python 3.9, or other versions, you don't have that.
But if you want Python 3.8, the soon-to-be-released Python 3.9, or other versions, you don't have that.
That's surprisingly new even. I remember Debian being very behind when it came to Python3.