Android, currently. ;-p

You're assuming that salespeople can't be automated away. Also, that there will be jobs in the future. A plausible bet but still somewhat risky.

You started with a laundry list, I didn't. When it comes to that, CL is hard to beat. "Playgrounds"? What about reshaping the whole program on the heap while it's running, almost without limitations? Including persistent object databases if you have those (one might argue that without the ability to do that, transparently integrated object databases are quite difficult to pull off). You can implement any kind of workspaces or scratchpads or playgrounds (or what's the nom du jour for that ancient feature, dating back to Smalltalk-80, if I'm not mistaken) based on this solid foundation. But not the other way around. Many people don't need any of that, though. Certainly it's not the focus for the above mentioned server use of Go.

Then why isn't your build system written in the same language? Presumably it's a smaller software artifact of its own so bootstrapping it shouldn't be difficult even in the most pessimistic case.

There's also Maxima (formerly Macsyma) and REDUCE, both of which started in late 1960s or something like that.

It's shitty to write in directly, but a reasonable back end for compilers, though. Even more so with the future tail call elimination.

Go is a replacement of C for servers. So quite obviously some of the things aren't going to be there, since it's generally somewhat more conservative. More so as it's geared towards people writing their own language processing tools for heavy lifting in really large projects (admittedly, probably not something for the average phone app developer) which gets obviously easier if the language is simpler. That could make it a pretty good choice especially if you want to share code between a server and a client AND you're already settled on using it on the server side. Anyway, a laundry list of features ("half-features" for some of those you named to boot) is hardly an argument. If I want the ultimate rich ultra-flexible language, I already know where to find it.

Taxadermy being skinning people alive as an IRS officer? Sounds fun, actually...

Fortunately for us, there used to be not as much to destabilize, or to destabilize with, compared to today.

Beyond the things already mentioned, maybe to verify again if our intellectual ability to predict complex events from measurements actually works?

Of course it's not going to happen. Even if you were the Pope, France isn't that Catholic anymore.

Offshoring... ;-p But your large companies can always hire some H1Bs, of course.

TIL that the adult female artist/designer of that shirt is actually a 12 year old boy.

Maybe there's no ambiguity, but not all people prefer sex with dogs.

BTW, what does the JWST have to do with Obama? JWST went horribly wrong years before Obama got into office. Are you saying Obama is a time traveller? And what does JWST have to do with "studying global warming" anyway?