In 1996/7 I had a chance to use Tcl/Tk to build one of the first stock tickers on the web called DigitalTrader [1], after that we used it to build some of the first vector embeddings in 2005 for early biological language models at Lawrence Berkeley National Lab [2,3] for space biosciences. Still a fan.
[1] https://www.orafaq.com/usenet/comp.databases.oracle.misc/199...
[2] https://newscenter.lbl.gov/2005/03/31/a-search-engine-that-t...