Ahhhhh yes. When people post claims about it's terrible performance they're concerned about how the computer feels.
/s
No. When it comes down to it. Electron hogs and drains a user's laptop battery, which in turn affects their user experience. How hard is that to understand?
Not everyone has a Macbook with decent battery life. Some people don't like Macs, don't like Apple, or simply can't afford one.
If you program with a concern for perform and battery life, it'll run well on a Mac as well as an old computer.
If you code lazily with Electron, some people will notice: a drop in battery life, and a slowing down of their computer's responsiveness.
It's pretty simple really. Code for the lowest common denominator of your target audience.