^still not continuous for 4000 years+
So many monks were scientists
Knowledge in vedas, puranas, upanishads is encoded in song and dance and art. Panchatantra is for kids, these were stories for adults.
Many of these casual statements have better meanings. Sanskrit is good for programming they say, but its not about the coding language. Sanskrit has some unique features which makes it valuable. One of these is the pronounciation is very specific, and does not change from region to region or across periods of time. If you could speaks to machines in sanskrit then they could understand at every syllable, just as text input, instead of processing the whole string at once.
Some of these prayers and mantras had practical applications of just recitation, for example making sure sounds of vowels dont change across generations.
Abt vimanas, nuclear weapons, and whatever tech was supposed to exist, that is all fantasy obviously, its not like anyone really believes that stuff. The imagination was there, for seeing or hearing things from far, flying crafts, robots, wmds.... Science has still to invent shapeshifting, voice input for arms, everlasting materials, head transplants, mind controlled zombies...