90 seconds for a pit stop is an eternity.

Just for those that don't know, pitstops these days are under a few seconds. See for example: https://www.youtube.com/watch?v=OAd_t4wibM0

That's slightly misleading, as that pit stop didn't include refueling. Adding fuel will add about ~10 seconds to the pit stop. But you're still comparing ~10 seconds with ~100 seconds, which is an order of magnitude difference, when many actual races have been lost over 2 second delays in pit stops.

There's Formula E racing, their solution was to have 2 cars and the drivers switched. An interesting company to look at is Lucid Motors they provide a battery pack that lasts all race now.

You could do much better with a specialized high-risk vehicle, probably on the order of a couple of seconds.

tesla never had 90sec battery replacement tech