I find your interpretation and subsequent extrapolation on his qualification as senior unfair. He clearly tried TS and was frustrated by his initial experience,

I find your interpretation and subsequent extrapolation on his qualification as senior unfair. He clearly tried TS and was frustrated by his initial experience, because there were certain things he had a hard time understanding or justifying. There's no opportunity for broader self development here. I try stuff out and I scratch my head, should I risk sticking with it or should I move on. It's a gamble. Others have made the alternative bet with a different tech du jour and lost. So your results may vary.