Should I keep plan?

Should I keep my one plan that I have had for years? I recently had like 9 lines on my one plan with maybe 2 kick back promos 1 device financed and was paying around 270 a month. Recently canceled 5 lines and when asked what my new bill would be for 3 lines with one device financed they said it will be 190. Is it worth keeping this plan or upgrading to Go plus 5g?