Uploading and viewing multiple images is currently a very big hassle. This disincentivises photographers who wish to post photo albums without creating enormously long posts. It also disincentivises anyone who wishes to upload multiple pictures.
This post, for example, would be viewed more comfortably if album/gallery/carousel UI elements were enabled and allowed on most Steem UIs like Steempeak, Busy, Steemit, Partiko, eSteem, etc.
The gallery view should be standardized. Having a different gallery for each UI will make it hard for publishers to know what their code will look like on the viewers screen.
<gallery>
<img src="https://i.imgur.com/HPYDfNi.jpg alt="That time I went to Colombia">
https://i.imgur.com/HPYDfNi.jpg alt="That time I went to Singapour">
<img src="https://i.imgur.com/HPYDfNi.jpg alt="That time I went to South Korea">
https://i.imgur.com/HPYDfNi.jpg alt="The food I ate yesterday">
<img src="https://i.imgur.com/HPYDfNi.jpg alt="My broken shoes that I sent to fix last week">
</gallery>
If enough interest is shown, I can either take CSS, HTML and JS proposals or we can make some code proposals both for Vuejs and raw HTML so that this feature launch can be swiftly implemented by most major Steem UIs.