I've been saying this for a long time now, Nintendo builds their console with their 1st party games in mind, 3rd parties is like a distant after thought.
And that is actually wrong for Switch, except those really big AAA-productions.
A really big amount of games can be relatively easily ported. Including many japanese releases, the vast majority of indie games and more. Other games like Destiny 2, Final Fantasy XV or Battlefront 2 probably can't be ported at all or only with more or less massive downgrades.
But Switch dowsn't have that very special architecture Nintendos last consoles had nor is it inaccessible by any means.