How many Apple apps have you delivered, and how many of those were written in a functional language (Swift can act as a functional language, but it is not a "pure" one.)?

Seriously. We all have our specialties. It is, indeed, "snobbery," when we rubbish the experience and expertise of folks that choose different paths. I won't rubbish some of the truly marvelous stuff I see, coming from people that think what I do is "quaint." It would be nice if the favor of respect were returned.

Delivering ship software is quite valuable; especially at the Quality and Usability bar that I set for myself. I suspect that you may not be aware of the Discipline, creativity, patience, and just plain old-fashioned Hard Work that goes into moving a piece of software out of the "toy" arena, and into the "ship" arena. The difference in project lifecycle times is quite sobering.

I can write a fairly full-featured app, in a couple of days, but it takes months to make one that I consider "ship-worthy," and I'm really at the top of my game, in my sandbox.

I have been delivering ship software for my entire adult life. I know that it isn't world-changing, prize-winning, theoretical marvels, but it has had direct and meaningful impact on thousands of lives.

I really appreciate it when the work of theorists makes it to my level. The Swift language is an object example. I really like it, and I know that one of the big reasons is because they cribbed from the FP workbook.