There's no clawback for sandbagging the future, no reward for present impact of past work. The people who flock to these projects are there to score a quick promo/raise and move on to the next new thing.
Because shuttering the business would be an existential threat while Google routinely shutters what would otherwise be successful business like domains/inbox/travel/reader/cloud print/code/podcasts, or otherwise refuses to treat with the level of seriousness/vision required to long term success like stadia/Chrome OS/Nest/plus/news etc.
Yeah but the vast majority of people don't actually use home dir directly and the people who do also know enough to enable it in finder options, search for it using help or the help search soertcut, bookmark or search for it using spotlight.
Spotlight (cmd space) also means you pretty much never have to navigate to a file/folder.
Fyi home is cmd + shift + h which you can find in the go menu or by search for home in the help menu.
3 years is a long time but IMO not enough to being a 100+ watt SoC down to ~20-30 required for that form factor.
That being said, Nvidia is still much more energy efficient graphics wise vs AMD so I could see it getting fairly close - maybe 70-80%. CPU wise though I doubt they'll be as close just because of power.