Very much agree with this.

That said given the quality of what they have put out, I'd surmise the issue here is morelikely they don't feel the same pain on load times?

Bandwidth too good, rigs too powerful, dev envs overpowered, etc. to enable developer velocity can often also mask real world problems.

Hell, even hot reload can mean you don't see load as often and are able to easily rationalize as "not that big a deal" - I wouldn't necessarily take it as a sign they are not deeply invested in their craft.