Generational stereotypes (Trigger Warning for Jeremy Vine!)

Jeremy Vine is currently discussing 'Generation Zee' and whether they are workshy. He irritates me at the best of times, but on this he's utterly infuriating. He is obsessed with not being a 'Boomer' as he was born in 1965, which is on the cusp of Boomer and Gen X, and is always banging on about who belongs in which group. I think he believes it makes him seem younger than he is.

The whole thing is a marketing invention anyway, not a real 'thing'. How can there be significant differences between someone born in 1965 (Gen X), and 1964 (Boomer), and not between people born in 1965 and 1979 (both Gen X) or between people born in 1945 and 1964 (both Boomers)? It makes no sense. Some US scales include 'Generation Jones', or 'Boomers 2' which splits the Boomer generation between those born between 1945-54 and 1955-64. That makes a bit more more sense, but still ignores sex, social class, geographical differences (and luck, which IMO has the greatest influence on life chances).

I've switched off JV, as there is a ranting young woman who's representing 'Gen Zee' and is shouting down Nina Myscow, who is being very calm and reasonable about it, and I can't bear it any more (I may be a bit stressed ).

So, having got that off my chest, what are your views on these supposed generational differences? Is it broadly true that Millennials are workshop, Gen Z are narcissistic, Boomers are selfish and spoilt, and so on, or is it a load of tosh?