One thing that concerns me about not having an addition is that there is no consistent place to "draw a line in the sand" from a rules perspective.
For example, let's assume it's 2029, and they've done away with editions since 2024 and periodically update the rules over over time.
Now let's say you want to get a game together with new people. At session zero, you find a person who plays with the rules released in 2024, another who plays with the rules updated in 2026, another who plays with the rules as they were updated in 2028, and you want to run the game with the rules updated in 2029.....
Sure, you could get everyone to agree to the 2029 update, but there will be a lot of confusion and frustration as people want to do something, and you say you can't because the 2029 update did away with it...Or they accidentally build a PC from the 2027 update, etc, etc.
With editions, you can say, these are the set of rules, and here's the book with those rules.
If WoTC starts updating rules like a stream of consciousness, without any "markers" as to the changes, we could really experience a scenario like I mentioned above.