Key takeaway
The switch is overdue the moment someone has to open the file and ask around before they can say who owns a task.
Excel is a genuinely reasonable place to run a small project, a single owner, a short list of tasks, nothing that depends on anything else. The mistake is not starting there, it is staying there past the point where the sheet is doing real structural work it was never built for. There is a set of concrete, checkable signs that moment has arrived, rather than a vague sense that a spreadsheet feels unprofessional.
The concrete signs, not the vague feeling
Ask three questions. Does a task in the sheet depend on another task, in a way that matters if the first one slips? A spreadsheet has no concept of that relationship, it just has rows. Do more than one or two people edit it regularly? That is when "whoever saved last wins" starts silently overwriting someone else's update. And does anything on the sheet have a due date that matters, with no way for the sheet itself to remind the owner when it arrives? If two or more of those are true, the spreadsheet is not saving time anymore, it is costing someone real hours a week manually holding together structure a grid of cells cannot represent.
What actually makes the migration painless
The part people dread about switching is retyping everything by hand, which is a real cost, not an imagined one. The fix is a genuine bulk import: uploading the CSV or Excel file you already have and having the tool bring in the task list directly, flagging anything it could not match, like an owner's name that does not line up with anyone on the roster, rather than silently dropping it. Done that way, migrating an existing project takes an afternoon, not the week of manual re-entry that makes most spreadsheet-to-tool switches get postponed indefinitely.