I tried to downvote your comment for making unsubstantiated claims like "The (vast) majority of people don't engage with these tools". But was unable to because I don't have enough karma. Do with that what you please.

Videos usually had about 10% of the number of votes compared to views, so depending on how you define (vast) majority it is correct.

It's possible, if that image has a startup script to fetch the .apk from a third party source & install it. I've put custom/specialty ROMs on old Android devices in the past and they often come with random apps I don't need and uninstall on first boot.

I think the biggest problem with Yelp is fake reviews intended to harm a business either from competition or disgruntled ex-employees. They allow 1-star reviews from throwaway accounts to stay on the front page and filter 5 star reviews from active users unless you pay for their service which includes 'account management support' to dispute fake reviews.

You can't drill a curved hole.

It's trivial to drill gently curved holes in wood using a Forstner bit or a suitably shaped spade bit. You can cut the workpiece in half, rout or mill a curved channel in both halves and fasten the two halves back together. You can use a curved electrode with electrochemical or electrical discharge machining. Of course, the best option is to design the part without a curved hole in the first place.

Electrical discharge machining, seriously? Not even well equipped machine shops are likely to have such specialized equipment.

I think you're proving his point that subtractive fabrication technologies have their limits (as do additive).

https://en.wikipedia.org/wiki/End_mill ?