If your backlog contains commitments, dates, amounts, or wording that could create obligations, the answer changes. Writing quality is secondary to whether the assistant quietly alters facts while making the text sound cleaner. A polished sentence can still turn “we may deliver Friday” into “we will deliver Friday.”
For that kind of work, I’d use ChatGPT, but I would not keep the entire backlog in one sprawling conversation. That is where I disagree slightly with the idea that more shared context is always helpful. Old tone instructions, exceptions, and corrections can leak into unrelated jobs. Split the work by task type: email rewrites in one chat, summaries in another, and note cleanup somewhere else. Give each chat a short instruction set and start fresh when the subject changes.
For rewrites, require two outputs: the revised text and a brief change log identifying anything that affected meaning. Tell it to preserve names, dates, quantities, deadlines, uncertainty, and quoted language exactly unless you approve a change. This makes review much faster because you are checking a controlled transformation instead of rereading every sentence as though it were newly written.
Muse may be the better choice if removing input friction is the real priority. If the material already sits across connected apps and manually copying it into a chat is taking most of your time, an agent has a practical advantage. But that advantage disappears when permissions fail, an app connection changes, or the agent cannot show where a detail came from. For routine office work, provenance matters more than an impressive autonomous run. You want to know which message, note, or file supplied each claim.
A download spike mostly tells you that people noticed the launch. It does not tell you how the product behaves on the fiftieth repetitive item, when instructions are less tidy and your attention is fading. Given the work you described, ChatGPT is the more direct choice, paired with strict preservation rules and separate chats for separate job types. Muse becomes interesting when the bottleneck is moving information between systems rather than producing the text itself.