Both fractional scaling and thumbnails did require massive background work.
The term „impossible“ is therefore incorrect. It required huge changes in the backend which weren’t feasible in short term. The thumbnails are done already and the new renderes are approaching.
Keep in mind, developers strive good solutions. Users need good solutions. Companies are often happy with less reliable solutions because they are forced to be fast. And this less reliable stuff tends to stay long.
Keep in mind, developers strive good solutions. Users need good solutions. Companies are often happy with less reliable solutions because they are forced to be fast. And this less reliable stuff tends to stay long.