The chip shortage is playing an outsized role here. Vehicles are being delivered with IOUs to come back in a year or two to have chips retrofitted in order to enable options listed on the window sticker. Everything from climate control and heated seats, to wireless phone charging, to autostop/gas saving measures, to lane keeping and collision avoidance. And delivery numbers are still extremely low.
Catching up means either years of bringing up total factory capacity to beyond pre-covid levels and catching up on the chip shortage... or a recession or other event that suppresses demand.
Transient in this sense only applies if we're taking about fractions of a decade, not fractions of a year.
I don't know the answer to this, but if the choice is either let inflation run hot like this for another couple of years or engineer a recession, is there a clear policy answer? The benefits of a hot economy seem to outweigh the downsides from the perspective of high employment, but perhaps not in other ways.
Just 2 years ago, the worry was whether we would end up in a deflationary spiral and have no real policy levers to exit. Given the lag time for any policy response to take effect, it seems really hard to get correct. I definitely don't envy anyone who's making policy decisions on this.