Is it relevant that it’s written in a lisp? Probably not. But then, maybe. Baseless speculation: mine pre-dates their internet connected models, which means it’s 100% plug and play. The only possible config is the system clock and the startup schedule, and I’m just using what the prior owner had already set. Had the OS been written in a more traditional language perhaps the engineers would have been tempted to include all the modern IOT features from the start and the result would be the complex app-driven network-needing mess that so many products tangle themselves up in (including perhaps the modern Roombas).
Again, that’s all baseless speculation, but I do see a potential connection between folks who choose to code a robot in lisp and folks who eschew “sugar” features in favor of the most pure “do one thing and do it better than anything else” implementation.