It blows my mind that suction cups are used to hold things intended to last for many years underwater when suction cups themselves seem to be good for only 3-4 years underwater.
To the subject, I'll mention the well-designed Tunze powerheads. They use a magnet to affix to the tank which is nice, but I don't think I still have a single one running currently. And I bet I've bought ten of them over the years. Also Ebo Jaegar heaters used to be my go-to brand but after a while every one I owned started getting moisture inside of them.
Nothing good happens fast in an ecosystem.