Turn on _repr_html_ by default?

[jsignell]

I just wanted to open this to discuss turning the repr_html on by default. This PR #3425 added it as a style option, but I suspect that more people will use if it is on by default. Does that seem like a reasonable change?

[max-sixty]

Yes from me!
I still think it's worth keeping the option though

[benbovy]

+1! I'm too often too lazy to turn it on, what a shame! And also +1 for keeping the option.

[crusaderky]

+1