Certainly it would seem that newer generations of airline aircraft are more susceptible to RFI and EMC effects than valve-era things like the ancient old beasts which I fly!
What happened to that idea of building a properly certificated 'local' GSM base station into aeroplanes which would cause any switched on phones to radiate at their minimum power levels, reducing RFI risk and providing cellular facilities to the revenue earners?
Most 'interesting' self-made IFE system I ever saw was something which I caught my ground crew using on board the ac in flight. It consisted of a domestic TV set balanced on a table wired to the shaver socket via a mains cable running along the floor, a domestic VCR similarly rigged connected to the TV and external speakers on the overhead racks. On this dangerous lash-up they were watching illegal pornographic movies. Fun detector me had the whole thing dismantled and stowed away - and they were told to 'lose' the tapes........