I have a 1937 Tudor that I bought last year. I had no idea how bad the windows were (single pane, casement, glass) until my first winter. To stay warm, we had to tape up all the grids of the window and tape around the windows with masking tape, plus addplastic and sytrofoam.
I am debating interior storms vs replacement windows. Storms are cheaper but not cheap. Also the current windows are so leaky that it will take time and cost to repair these windows (which I've been told to do before getting the storms).
Storms add no value to the house. Replacement windows add value to the house. So even though they are expensive, I'm adding direct value to my house. Also I found an installer who would be willing to do it a few at a time.
My gut says to replace the windows. When I search on replacement windows of old homes, I see plenty of advice not to do it.
MY question is if anyone has successfully replaced windows on an old home (75 years+ like mine) and were successful and happy having done. Or anyone who regrets replacement old windows.