This story from an Excel Labs user is frustrating because it describes a problem that shouldn't exist. The add-on's advanced formula environment is genuinely useful, but a UI lag that forces you to restart your workbook multiple times an hour is not a trade-off any professional should accept. It is a flaw that undermines the very productivity the tool promises.
What makes this particularly telling is that the lag has nothing to do with calculation load. The user is clear: the stuttering happens when clicking or moving between cells, not when running complex formulas. That means the issue is in how the add-on interacts with Excel's interface layer, not in how it processes data. For anyone relying on this tool daily, that distinction matters. It suggests the problem is architectural, not a simple performance hiccup that a faster machine would fix. And the fact that the user has been dealing with it for months, without a resolution from Microsoft or the Excel Labs team, points to a deeper gap in quality assurance for an add-on that is otherwise innovative.
We think the user's instinct to keep the tool is understandable. The advanced formula environment is a meaningful step forward for spreadsheet work. But no feature, no matter how powerful, justifies a workflow that requires closing and reopening a workbook every fifteen minutes. That is not a minor annoyance; it is a broken experience. The user should not have to choose between the tool they want and the tool that works reliably.
Our take is direct: Microsoft needs to treat this as a priority bug, not a background issue. And for anyone in a similar position, report it through official channels. A tool that cannot sustain a stable UI for an hour of use is not ready for production work. Keep using it for exploration, but do not let loyalty to a promising feature cost you your flow. The solution should not involve restarting your work. It should involve the software working as designed.