A lot depends on your opponents. I believe, as long as you're facing players who are around your strength, the game should remain enjoyable.
If you're trying to protect your rating, feeling stressed, and avoiding opponents out of fear of Elo loss, then it suggests that you're overrated - and worried about slipping back down to a rating that's more accurate for you.
If you're accurately rated, though, then facing players at your range should feel "comfortable", regardless of what level you're at.
I'm wondering with years of training and playing experience, once you achieve 2000 plus elo rating does the game remain fun? Do the years of training and effort make you jaded? Do you still look forward to having a game of chess with someone equal to your rating or higher?
Or is it a monumental undertaking of time, effort, research, rating protection, etc. Do you play chess against lower rated opponents, or is that a waste of time or avoided for rating protection? Does rating protection strategy exist at higher levels of play? Thanks for replies.