UEFI ... true that, misnomers are HIGHLY confusing to me as I interpret words as meaning what they are saying ... even subtext, especially subtext ..
I got my 1st exposure in 20 years last year to all the things you just related... it was interesting and cost me some time trying to get up to speed with the 'new' concepts (the system architect had no reservations about telling me what a moron I was). It might pay off in the end though as now I'm in contention for a similar role with a company I worked with previously but on different technology. Higher level UI stuff as compared to what you just wrote about. Lower level to the crossroads of hardware and software.