What longterm side effects have others had from being on methotrexate?

I started first with just prednisone when initially diagnosed with PMR, but doctor realized within a month I needed to add the MTX. My pain slowly went away. Now three years later I’m down to 2mg prednisone and continue my 20mg weekly MTX dose. Work out with a trainer 3x/week and feeling pretty good. Also try to walk as much as I can. I hope to be off the prednisone sometime this summer. Have any of you had to continue the MTX for years and what are long term effects? My rheumatologist commented that she thinks I will need to stay on it for an extended period of time. Besides hair thinning I haven’t had any side effects. Would like to hear others stories of their experiences. Thank you.