I wrote about repotting my pandemic plant, the Shamrock (Oxalis), a while back. Its roots were growing through the holes in the bottom of the plastic container I bought it in. A year after buying it, the plant was only putting out a couple leaves and fewer flowers.
Here are before and after and after photos. Delightful after-after!

One year later Getting ready to repot Look at those roots!
About a month after repotting New shoots and flowers