I should honestly give DAP a try in Neovim. I think DAP being newer, seemingly getting less attention than other elaborate technologies to integrate like LSP or Treesitter, and having a more complex UI made me suspect it might not be reliable. Adding a DAP plugin to a secondary editor also feels less risky. But it sounds like my concerns may have been addressed, if not overblown all along.
If you worry about it interfering with other stuff, you can lazy load nvim-dap + nvim-dap-ui on demand (using lazy.nvim for example), but it's not really interfering with what I use in my experience.
Plus I use sessions for key mappings, i.e. temporary sets of mappings used for debugging for example, which can be reset to what they were after debugging is finished. This way you can assign a bunch of common combos for stuff like step in / step out without it messing up other existing mappings which you can restore after you are done.
