Yup that's true. I meant (but did not at all make clear) that I'm using Shimano's Di2 as a generic example. Editing my Op now....
It certainly wasn't a dig at you!
Being a failed tech bro I've always been into the joins between cycling and tech so was a relatively early adopter of electronic group sets, and yes it was Shimano Di2. Since then I've had another Di2 equipped bike (a TT bike), refitted my original Di2 groupset to another frame post-collision and now my latest bike is fitted with SRAM Red eTap AXS, so I've got an opinion for sure. For balance my old-reliable has had various mechanical Shimano groupsets fitted and I've even got a Rohloff flat-bar tourer if we want to do derailleur vs hub shoot-off.
I really had been meaning to open a thread like this for a while because, while some of the criticisms are valid, I think there's an element of groupthink across the forum that has a whiff of the old git about it. I'm lacking the time to go full Benstead on the subject so here's my TL;DR;
Gearing in general - different strokes for different folks. Different solutions work for different disciplines and budgets.
Electronic gears in general - more reliable and tougher than you think. Great indexing and shifting consistency. Shifting up to big ring easier 😜. Can customise shifting - i.e. let the software manage big ring shifts. Too expensive. Needs some standard/open protocols. Requires charging. Problems generally can't be repaired in the field. Diagnosing problems can be difficult. Obsolescence more of an issue ATM.
Mechanical derailleurs in general - not as reliable as you think (looking at you brifters!

). Modern indexing is good but can be tricky to set up. Cost-effective. Some ability to repair in the field and diagnosing issues usually easier.
Shimano Di2 - first viable electronic groupset. Single battery solution gives loooong battery life but can't be charged away from bike. Great shifting performance. 4 paddles for shifts is very flexible and configurable. Wired (or partially wired) system increases damage risk and reduces reliability IMO. Typical garbage Shimano documentation. Awful software. Shimano closed protocols (see recent hammerhead integration issue).
SRAM eTap - Absolutely no wires. Double battery solution requires charging more frequently but can be done away from the bike - very neat. Had zero problems with water-ingress etc. Also great shifting (maybe slightly less good than Shimano?). Two paddle shifters are less flexible and "double tap" not for everyone. Documentation much more consumer focused and better software. Better and easier 'soft' configuration options. Potential for more open and standard hardware/software stack. Confusing product lineup and inter-generation compatibility.
Campag eps - 🤷♂️
Rohloff - "wow, you fitted a coffee grinder to your rear wheel!"
