I can't stand Dave's garage. There's no garage - he's a Microsoft millionaire who became a youtuber bragging about his empty golden tech life escapades fueled by the well-paying position as a programmer at Microsoft in the past.

Now he made a shallow acolyte video which seems like it should have been a paid marketing by the IBM mainframe division. I hope he got payed well, otherwise Dave is even more self-unaware that I thought. I get this is what Linus Tech Tips would do for a living, but really, a senior programmer with gobs of money is doing this superficial reporting on a what IBM told him on his trip there???

Seriously, this video (and YT comments it has) is a naive uncritical sucker reverberating most of the standard phrases from the mainframe sphere, although admittedly, with nice high-def shots of the machine components. I expected more serious adult commentary, not a teenage boy fan ravings.

Mainframes by IBM are a niche expensive product that is an interesting concept and history, but it is not an "amazing machine" to be put up today. There is no perspective for most young people working on mainframes, they will be phased out eventually. It's a solid product for the captured audience, which is like 2 banks and card payment processors, but that's it.

"Woo, they don't rely on ECC, they have multiple independent modules, because cosmic radiation, so cool" Get real, this is not an important problem, ECC works already, and good software has to account for occassional HW errors anyway.