I agree and disagree with your points.
- LED bulbs. I was an early adopter when they were really expensive so I doubt I have recouped that initial cost in any kind of energy savings. I did it because I'm selfish and lazy and got tired of changing bulbs. I'm still trying to use up the 20 I bought way back in the day but they just never burn out
I do feel better I'm not tossing bulbs in a landfill.
- Water heater and furnace. Replaced the water heater as it started leaking. Wasn't terribly expensive but there wasn't any reduction is energy cost following the installation. Did the furnace a few months later as mine was more than 30yrs old and the heating company I use had one of those 0% finance deals for 12 months going so we figured we'd do it. Total cost for the two was around $7K for both. Watching the gas bills afterward, there was never a reduction over previous months so that money will never get recouped but again, I did it because like heat and hot water
- Electric or Hybrid cars. The costs of Hybrids are coming down quickly so they are making more sense now than just a few years back. My buddy bought a a brand new Camry Hybrid back in 2015. Cost was $33K. In real world driving he gets around 40mpg. Around the same time I picked up a Camry SE non-hybrid. Paid $23K for mine and I average a real world mileage around 30mpg. Cars have basically the same creature comforts and features so they are comparable. Doing the math it there was a $10K difference in price and we used the $5.00 per gallon price that was the national average here a few months back and found that the difference in fuel cost to be around $500 a year based on 12500 miles. With those numbers it would take him 20 yrs to see a savings over buying a a non-hybrid. If you redo the math at todays lower gas prices ($3.09) that time jumps to 31 yrs.
As for pure electrics. Weather they are cheaper to own come down to a model by model bases. Read an interesting article from Car and Driver recently on the cost of owning a Kona gas vs electric and the gas was cheaper. They went on to compare an F150 gas vs F150 Lightning where the electric was cheaper. For me electric cars are a novelty and I can't see myself ever spending money on one as they jut don't fit my lifestyle. I just simply drive too darn much.
Edit: One last thought. I was quoted to put solar on my roof by two different companies when I first bought this house back in 2015. The lower of the two bids was $60K. They offered to finance it over 10 yrs. which broke down to around $6200 a year or $515ish a month. Hard to justify when I my electric bill has never exceeded $100 per month.