No regrets here, had a curved monitor now coming up to half a decade and had one ever since as primary monitor. To be honest if your sitting in front of of, get used to it pretty quickly anyways and for 3440 x 1440 ultrawide, brings in the edges slightly into your vision. I think some panels out now have a more aggressive curve and not tried them, but suspect either way, you will quickly become used to it.
For 27" panel though, I would say its not massively important for a curved panel to be honest.
Most games these days also reasonable 3440 x 1440 support, more so modern titles which is nice. You mention Youtube being a use case, do be aware a lot of content is going to have black bars on the edges, so basically you will have the image in the centre in 2560 x 1440.