> He now uses a Lenovo ThinkPad laptop
And that is relevant in what way?
> with GNU and Linux software
Alright, fair enough.
> he’s swapped Microsoft Office for LibreOffice
As before, fair enough, if one believes in FOSS being "better" than commercial software.
> he doesn’t use Gmail but Mozilla’s Thunderbird
Apples with oranges. The former is mail provider, also offering a web interface. The latter is an email client, which is pretty useless without a place where you receive emails. So what is actually using instead of Gmail?
> and, despite considering the iPhone the best on the market, he uses an Android handset with the Cyanogenmod operating system.
Not only contradicts the "ditching Google" credo, but is also a useless move in this context. If he really wants to follow through with his FOSS approach he should be using Sailfish OS, Tizen, Ubuntu Touch or Firefox OS.