I don't know what your business is, but if it's consulting or custom development, then you may be wrong. It matters very much to me if I buy something from you

I don't know what your business is, but if it's consulting or custom development, then you may be wrong. It matters very much to me if I buy something from you that is written in some esoteric language that only a few people can develop for. Obscure languages are a form of vendor lock-in, in that sense. if you're developing SAAS or something, then I'm sure you're right, but that argument doesn't apply to everybody.