Why wouldn’t it have a future? We use it quite a lot in the European public sector where we can’t use google maps because of privacy issues.
We’ve written a small app that does route calculations for us to make reporting business related driving (you get a refund, but that has to be taxed in specific ways) an automated process. We use OSM in that, but we do pay a company to do the routing algorithm and supply the data in a way that doesn’t abuse the standard OSM api. I’m not sure exactly how they do that, I think they host part of OSM or something like that. There is a big industry for small companies which are specialized in those things in Europe, and they are typically cheaper and easier to use than google.
We also rely heavily on OSM in our GIS department, where we have our own private maps, though they aren’t so much for traffic we have been building our own “street-view” thing, using OSM and our own 360 images.
The disadvantage of OSM is actually the submission process, like if a street is wrong, and you supply the correct information, it’s not always accepted right away. Which is a huge issue if you rely on it for something serious. That hasn’t been an issue for us for two years though, but we did have one week where an elected official couldn’t submit his driving because of a wrong one-way street.