We don't teach slide rules and log tables in school anymore. Calculators and computers have created a huge metacognitive laziness for me, and I teach calculus and have a PhD in statistics. I barely remember the unit circle except for multiples of pi/4 radians. I can do it in multiples of pi/6 but I'm slower.
But guess what? I don't think I'm a worse mathematician because I don't remember these things reflexively. I might be a little slower getting the answer to a trivial problem, but I can still find a solution to a complex problem. I look up integral forms in my pocket book of integrals or on Wolfram Alpha, because even if I could derive the answer myself I don't think I'd be right 100% of the time. So metacognitive laziness has set in for me already.
But I think as long as we can figure out how to stop metacognitive laziness before it turns into full-fledged brain-rot, then we'll be okay. We'll survive as long as we can still teach students how to think critically, and figure out how to let AI assist us rather than turn us into the humans on the ship from Wall-E. I'm a little worried that we'll make some short term mistakes (like not adapting our cirriculum fast enough), but it will work out.