Gatsby: Make Gatsby more resilient against slow networks, low batteries, etc.

[KyleAMathews]

This talk is full of good ideas — https://docs.google.com/presentation/d/169gop22hzmu-NEUiNQyoIZ_oRiMqNLFMKNJVvX42iC8/present?slide=id.g13fd0b2db0_0_13

One easy win would be adding a check to gatsby-image that on slow networks, don't download higher resolution images as that takes longer making for a poorer experience.

[gatsbot[bot]]

Old issues will be closed after 30 days of inactivity. This issue has been quiet for 20 days and is being marked as stale. Reply here or add the label "not stale" to keep this issue open!

[CanRau]

Noooo don't close it @gatsbot I really like the idea 💯 or have I missed anything?? 🤓

[DSchau]

Reply here or add the label "not stale" to keep this issue open!

You've done your part already :) The next time the bot runs it'll remove the label!

[gatsbot[bot]]

This issue is being closed due to inactivity. Is this a mistake? Please re-open this issue or create a new issue.

[jgierer12]

Bad bot :wink:

[m-allanson]

I'm going to close this for now as it's not specifically actionable. @KyleAMathews will open new issues where appropriate.