I really enjoy using Tape, the minimalism of the UI and the overall simplicity of the software is like a breath of fresh air when you come from Trello and Jira. I find it very elegant and perfect for my workflow, but I understand it is not for everyone, since you cannot use it over different devices, or with other people.
I think it is a very nice alternative!✨
(oh and I think the best theme is "Pastel Night", Im already using softwares from Hundred Rabbits, and it was a nice surprise to see that you are using the same theme system!)