It was nice/workable for its time, and one wishes that there was some modern alternative, but "RAD" seems to have dropped off the radar.

Some things I've tried/looked into (beyond TCL/TK):

- Gambas --- Linux only, not sure if there's a nice visual UI builder

- LiveCode --- still salty about the license rug pull, wish the openxtalk folks could get some traction

- MoonBasic --- looks promising, but currently trying....

- flet.dev --- the AI-integration in this makes it quite compelling, though I wish that there was an integrated UI drawing tool, https://github.com/raffieeey/Flet-Visual-Builder is self-described as buggy and hasn't seen an update in 7 months

- Lazarus --- still bummed I never got anywhere with Delphi --- if flet.dev doesn't work out, may try it