I can understand feeling that you must hold on to the hundreds of hours that you invested in LOR sequences. There is also a sense of mistrust that keeps you from believing that you can create something better in xlights in just an hour.
Break the shackles. Jump in with both feet. Walk forward and don't look back. Use metaphors to make your point. Try it, you'll like it.
And you don't need to delete your LOR sequences... so you'll have a safety net.

Mine is a matter of time.. I am running out. I have so much already programmed and I do it with a lot of precision, so I need the granular control that I have in LOR.. As well, there is a hardware issue. I have no input capability in XL like with LOR. I have also had crashes with XL4 that I don't have with LOR.
Bottom line is that next year I might just switch.. but no time this year.. so the group model export would be soooooo incredibly helpful.