I use alexandrite to switch between different lemmy instances and change the default post layout to card style. When I first started using lemmy, the I found the difference between the reddit and lemmy in the post feed to be jarring as I was used to a card style layout.

I find on a desktop browser, I prefer to be able to see images without opening a thread. I initially used kbin.social exclusively for this feature but disliked the way their sorting algorithms are setup. Having the ability to easily switch instances is also a nice feature particularly for new users who are unsure what lemmy instance they want to use.