Should a 44-year-old woman with misaligned teeth get braces?

Ans: Hello
By "not so strong" do you mean that your teeth are more prone to decay (cavities) and chip off easily?
If so, your teeth could be deficient in Calcium. I'm assuming you have always maintained good oral hygiene. Unfortunately calcium supplements taken after childhood do not help as tooth formation is already complete by then.
You might benefit from using certain special toothpastes which claim to remineralise teeth. But, in general, it means you need to take extra care with your rinsing/brushing/flossing to keep your teeth healthy.
If by "not so strong" you mean your teeth are shaking or you cannot confidently bite something hard, the fault lies not in your teeth but with your gums and supporting structures. Weak or infected gums can be easily treated. Please visit your dentist so that the problem can be diagnosed and appropriately treated

Ans: Then you need not get them extracted. Just be patient and allow them to fall naturally.

Ans: Hello
A bridge is an economical option to replace missing teeth provided you have strong, healthy anchor teeth on either side of the gap. But if, as you say, the remaining teeth are also not in good shape then implants should be considered. Please note your gums and jawbone should be healthy in order to support implants. Please consult a good Prosthodontist (a dentist who specialises in teeth replacement) to get your oral health evaluated and find the best solution

Ans: Hello
Teeth shifting and causing gaps to appear at your age (where there were no gaps earlier) strongly suggests weakness of gums.
Kindly consult a dentist to have your gum condition assessed and treated. Proper gum treatment can stop teeth shifting further and the gaps getting bigger. But cannot reverse the shifting that has already occurred.
Once the gums have been stabilised you may need to undergo corrective orthodontic treatment.
Tooth aligners, also known as clear aligners, can be used by people to have their teeth straightened or to have gaps between teeth closed. Thanks to advancements in dental treatment there is no strict upper age limit for using tooth aligners. Many adults in their 30s, 40s, and 50s, have successfully used aligners to straighten their teeth.

However, before using tooth aligners, it's essential to consult with an orthodontist or a dentist to determine if aligners are suitable for your specific needs and age. And please use aligners only under an orthodontist's supervision.

Ans: Hello
You have to examine why you want your teeth aligned.
Do you have a functional problem as a result of the mis-alignment?
Functional problems could be speech impairment, inefficient mastication, inadvertently biting your lip, and so on.
If you have none of these problems then the only outcome would be cosmetic