It's possible for one character to learn every single skill available in Ryzom, if the time is taken to advance everything, and they're subscribed. What about unsubscribed characters? Is a free-to-play character able to learn every single skill up to level 125, assuming they're willing to spend the time to advance everything?
I will attempt to answer this question. Please feel free to post corrections or discussion or additions.
(Note: Ryzom is awesome. Subscribing is great and it's important to support things you like if you want them to continue existing and developing. And I do realize this topic is a bit silly -- if you're going to put in enough effort that these things start to matter, you'll likely become interested in subscribing that character and this article won't be relevant.)
(Also, a big thank you to everyone on the universe channel for their help with this, especially Robplus for help with the math!)