Are superchargers difficult to access now?

Changing roles and getting a car allowance - the ex display models offering a year free supercharging seems ludicrously good value for someone like me who’s going to be travelling a lot.

- Im going to be public charging a lot, and for the first year thats entirely free, AND

- i can claim business mileage rates, meaning im quite literally getting paid to drive it around

Because my mileage will be so high, I’m not particularly bothered about year two or three either - driving a car that does 4 miles/KwHr, charging it at 40pish per Kw and getting reimbursed 45p a mile, I’m still quids in.

My only anxiety is about charging it, when ive heard a lot about how busy superchargers are nowadays. Will I face much difficulty accessing them, or does anyone know of any notorious areas I might struggle in? I’ll be driving all around the UK and Ireland.