I have spent the last few years dealing with ageing family members and am still doing so now.
My 2 cents - prevention is key. It sounds like she doesn't have any physical problems yet, but if there's any risk - such as a fall - it's better to get her into a place that would limit the possibility. Too many seniors leave it way too late and then the decision is taken out of their hands. They have a catastrophic fall, a stint in the hospital or rehab and never return home. Tragic.
The other aspect is cognitive help. If she's already in a senior community, they might have step-up care where they can start helping with any medications, keep a closer eye on how she's managing, etc.
I would recommend doing your homework and asking the "what if" questions.
What if she starts needing one-on-one care, who can provide this, how will it be funded? etc.
With people at this age, cognitive decline can progress rapidly and take you by surprise.
PS. If you read up at web sites like Alzheimer's, they give great advice on how to help people who are starting to forget.