The Goodison Park (built 1892) away dressing rooms are really Spartan and uncomfortable. They are poorly heated, are right under the stand (noisy), there's only one toilet etc.
I don't think Everton's home record can really get that much worse when they move into their new stadium next season though.
Except you can leak data even if you don't hold it. You are focusing on data at rest. Not storing the data obviously helps massively, but a bug or maliciously inserted code could lead to user data becoming compromised.
Great write up! I am the author of the TP2.0 page you linked to. I went through a very similar process to you, ended up disassembling the code for a Siemens PPD ECU (PowerPC architecture from memory, it was about 10 years ago) so I could turn of the DPF regeneration functionality.
I don't think Everton's home record can really get that much worse when they move into their new stadium next season though.