I run W7 also and I like it.
How much trouble do you think will it be to change to W9 when we are forced to do so?
Same as any switch. Constant updates, lose of some programs you’ve used for 10 years because the program maker and MS didn’t talk to each other, crashes, old programs that you paid for now requiring you you to pay for an upgrade. bloatware, new programs that you don’t need.