Here's a short list of things that don't work as well because of government regulations.
Dish washers My new one (about 6mo old) works WAY better than my old one and uses less water.
Laundry soap Tide Free Pods in cold/cold cycle and I work construction with red clay no complaints.
Showers Ok you are big right on this one. Pop the flow restrictor disc out or if it won't pop out drill it out.
Toilets Never had much of an issue but at home my toilets are older than me and I try and avoid pooping in public.
Clothes washing machines My washing machine is from the mid 90's so no experience.
Clothes dryers Ditto above but I feel like you are pulling this out your backside as there is no technical reason for this to be true.
Faucets HUH? I have literally noticed no difference in faucets. A few buildings I have been in have some ridiculously low flow faucets but it is so rare I doubt government regulation is to blame but rather bean counters. Also regulation on faucets dates back to '94 so yeah BS.
Gas cans I have two old Jerrycans but a quick google confirms that this may in fact be the most hated regulation ever. However you can still use OSHA approved cans which are not quite as cumbersome but stupid expensive.
So of your list of 7 things 4 are non-issues 1 doesn't seem to be an issue (clothes dryers) but I could see how on the low end of product it could be and 2 (showers and gas cans) are huge issues.