bad if never repot?

[Rusty Trichome]

Disadvantage of repot is your plant get stuck and you really destroy some roots (self experience)

You don't dig the plant out to re-pot. Place hand over top of pot, with plant stem between fingers. Turn whole thing upside down and give a sharp 'tap' on the bottom, thus loosening the soil ball from the pot and catching the soil ball in your hand. Place in larger/prepared pot, and add soil, then water.

Another one, it is messy, and not automatized, require more energy , i really think it is not necesary
just my opinion

Not too messy, but for you, and most of the rest of us soil growers, yes...it's necessary.
If you are worried about messy, perhaps soap making or cleaning windshields off Wall St. and Broadway is a hobby better suited for you, lol.
Automation...? We aren't growin' commercial hydroponic lettuce, here, lol.