This question requires a very careful consideration of your needs. The various doctors have kindly listed out the various options available.
In my opinion though, at age 50+, it's likely you need some volumising with fillers and combining that with HIFU/Ulthera/Thermage for skin tightening can get rather good results too.
Threadlift alone without consideration of volume issues may give you slightly disappointing results so I would suggest a detailed consultation with your doctor for this treatment.
