I guess I forgot about the first part of the meme and was talking bacteria, sorry. For eucaryotic cells sure you’d take your time in a -80°C first.

I mean obviously you’d use DMSO or glycerol, I just didn’t want to get too technical. That being said I’ve always snap-frozen bacteria with LN2 and it worked just fine. Now for eucaryotic cells, sure, you’d want to go slow.

Edit : ok now re-reading the meme I understand why you thought I was talking about eucaryotic cells. My bad !

You’d actually want to freeze them as fast as possible, to prevent the growth of large ice crystals that would tear the cell apart. That’s why you do it by dunking them in liquid nitrogen. But yeah frozen bacteria are basically immortal.