Containers are fine but docker is a pain in the ass that lazy people use when they don’t want to provide clean installation/packaging.
How many times have I seen an equivalent of “we use a custom fork of an obsolete version of an unmaintained package, so if you want to compile it yourself good luck because we forgot how we even did it. Alternatively, you can install the docker version”…
The term boomer refers to a mentality, not to the generation anymore.
By the current use of the term, yes, they all are, as this use refers to people who refuse change out of irrational belief that old times were better, glorify a violent and fascist past, and deny the existence of modern science because they refuse to adapt their obsolete lifestyle.