This by itself is enough a challenge, but there's also the question of whether coding will be a thing in twenty years - given the recent advances in AI and the question of whether jobs in general will be a thing after AI become sufficiently advanced. I enjoy coding for the creative aspects and the pride I feel when completing a difficult task - but lately my technophobia has been winning over my affinity for the creativity involved in the task.
There's also the feeling I get that with the accelerating technology curve, software development is becoming even more of a 'shapeless' profession as the years go by - it's difficult to find a sense of identity when the technologies I'm learning could be obsolete in a couple of years.
Trying to find a way around these thoughts, because they've really become a barrier to myself really enjoying the learning process - but I think they're worth consideration.