>>39029458They need to shit out games constantly so the anime can release new seasons, new movies can be released (complete with new event-only mons!), the TCG can release new sets and TPC can release new merchandise and promotions.
HD development is hell. Many, companies went bankrupt while others severely deceased their quality. It just took GF longer to get there because they used to focus on portable games.
Notice how they started working on SwSh after SM was done. They most likely are working right now on the next titles.
Expect Galar to be tiny, open areas to be a huge area of nothingness (like Hyrule in Ocarina of Time) and towns to be empty.