... it supports pointing at any public or private vector tile server, and does support supplying a starting coordinate and zoom. There is even a bug report explaining how to hack it for different font aspect ratios.
Realistically, it's not practical, but then, is a map? When I want to know where something is, the map lets you calculate "how far away is it and how do I get there? what's nearby?" at a glance, but you can query those things directly in OSM data (there's a cli for that too). For actual maps, I have several GPS devices and...a map. It folds up.
• No option for alternate character aspect ratios; what if your characters are square, like an 8×8 font?
• They are using a quite old database dump of OpenStreetMap.
• No option to jump directly to a coordinate and zoom level.