.su is available for registration, I'm not sure what the "in a limited way" is about. In Russia it's used to communicate old-schoolness, approximately.
It definitely is. In Germany, somebody was selling fraudulent public transit e-tickets on an .su domain for a while last year.
Not sure who the “.su” was supposed to appeal to, but they were slightly cheaper than officially licensed ones, which probably helped more than the TLD :)
Outside Russia it’s limited to renewals of existing domains due to sanctions. I believe ICANN is trying to eliminate the domain entirely due to it being obsolete, although I don’t know if a formal timeframe has been established for that yet.
The Lisp versions had the advantage that they were all written for the same GUI - Macintosh. I copied ideas from the LeLisp paper for my Franz Lisp & GEM environment back then.
There are too many holes in current GUI support.
The Lisp that traditionally had the best bindings on the Macintosh, CCL, doesn't run natively on current models.
McCLIM needs backends for Windows and OSX to be considered portable.
I remember reading the compendium of human-interface writings Apple put together in the 1990s. There was an exploration of ways to show age in software. They were changing the color and adding other aging effects to old files in the Finder.
I think part of that thought has stuck with me. I like storing things in directories by year. It is a structural reminder that a lot of the value of what I'm doing is tied to this moment in time. I can search back through "over the years" to find things, and it addresses this question of guilt.
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