"They had no concept of a duty of care to their users."

David Chisnall describes how NeoVim lost his undo history by silently deleting vim's undo files without upgrading them to its new format, then dismissed user concerns by claiming the "persistent undo" feature was unstable and unreliable. This incident demonstrated that NeoVim's developers lacked a fundamental duty of care toward user data, causing Chisnall to stop using the software entirely.