If shes found a cure for rheumatoid arthritis Ill be beating a path to her door.
Maybe being retired gave her the opportunity to find a treatment plan that manages her symptoms well enough to contemplate playing again. She may find that the rigours of the Tour increase her flares but nothing ventured, nothing gained.
I wonder how Caroline is going to fare in 2023 with her last successful year being 2018.She won the Australian Open in 2018 followed by Eastbourne and Beijing which was her last tournament win in October 2018. Her only tournament final since was Charleston in April 2019 when she lost to Madison Keys. Her final tournament was the 2020 Australian Open . She beat MTO Yastremska in the second round for her final tour win. Her last match was then a defeat to Ons Jabeur in the 3rd round. I know both Kim Clijsters and Sloane Stephens after a year out with injury came back to win the US Open unseeded. At that the time they were both in their 20's. Elina Svitolina has also cameback after pregnancy to win a tournament in 2023. However all these players were younger than Caroline and had not been out of the game as long.