Okey so when you are lv 1, you are level -9A Level Squish could leave us at level 110 perpetually and we'd never need another stat squish; our numbers would never go higher.
Imagine this. 8.0 is released. All level 110 characters are bumped down to 100. All Legion content is scaled back to be appropriate for levels 90-100, all item levels get scaled back, time-walking styled. We level up back to 110 in 8.0 content that would effectively leave us where 7.0 did in terms of ilvl. Every expansion going forward would be scaled back to level 100 on the subsequent expansion's release. We keep getting stronger, but level 1 just stops creeping away from us. It's only getting more and more obnoxious to level.