i tried niri for a few months earlier this year

ultimately it turned out that after years of i3/sway scrollable tiling doesn't feel natural at all (and neither do dynamic workspaces, but that's less significant). when i resurrected my desktop a couple of months into the experiment i found it also lagged quite badly on my desktop with an nvidia card (a 3090, tried both drivers) and i couldn't be bothered to figure that one out so that was the final straw and i went back to sway

i was quite impressed with the level of thought that went into the ux and the amount of polish in everything though. it already feels like a serious, well-made piece of software, and it's not even that old yet