All my desktop GUI software since 90s was / still is done in Delphi (Lazarus for multiplatform). The language / IDE grew but remained compatible and I've never

All my desktop GUI software since 90s was / still is done in Delphi (Lazarus for multiplatform). The language / IDE grew but remained compatible and I've never had to throw away the code. C++ merrily carried my backend solutions over the same timeframe with the same results. Same for C when writing firmware. Same for JavaScript / HTML for browser based front ends. In all of the above I used some domain specific libs but stayed away from big frameworks as those come and go pretty fast. I consider neither as a tech debt as they let me concentrate on the product rather than dwell on what tech do I use. I've never felt inferior for not using this new and shiny doodad as I've always delivered superior products and that is what mattered for my clients. Yes I had to program in whole bunch of other languages upon client requests but this was rather rare. I have good track record in creating new products from scratch and that is what my clients really want. They mostly do not care what I use for development. So no. I do not feel that tech debt at all and I still play with other tech a little to stay current in case it is needed by client.