Setting aside the "capability" of the tools, I knew it was the wrong direction after a couple months or so in. I specifically remember during a large feature implementation running out of tokens for my 5 hour window or whatever, and I just couldn't continue on my own. Mostly due to laziness (I'll just wait till tomorrow when my limit resets!), but I also picked up on my first big whiff of skill rot / atrophy brewing, and that made feel uncomfortable.
I just don't see this fully agentic approach going well long term. Talk about the ultimate dependency!! If the lights are "turned off" for whatever reason - outages, cost increases, or the agentic velocity finally reaches a complexity tipping point and you've lost control and understanding of your system to the point the agents are making things worse, whatever it is - do you really expect to be able to turn back the clock and step in to code at the productivity level and output you used to when you actually... wrote code?