To tell you frankly RWG Mobile is more economical than 1P Mobile and also powered by EE 5G network.
https://www.rwgmobile.wales/webshop/pay-monthly/
I pay year upfront 1 Year SIM - 250 mins, 250 SMS & 2GB data every month for 12 months. One-off charge £20. That is equivalent to £1.66 a month!!
Most people don't need 500GB mobile data and £25 a month is a waste of money. I can understand for people who don't have existing FTTC/FTTP services they may be dependent on mobile data. Or in case your connection was down. But this is very rare and when it happens will not happen for more than a couple of minutes.
For me 2GB is more than enough considering many places have WiFi hotspots for free. If my connection was ever down I can use my data allowance or connect to a WiFi and quickly do some work if needed.
The EU naturally has very good internet access. I have visited Bulgaria in 2017 where there was full fibre available. Everywhere across the city has WiFi available. You don't need data roaming when you visit a country in the EU as generally you get WiFi access in most coffee shops, restaurants, shopping malls, etc. You can use phone calls using online social media networks like Facebook, Skype, etc.
People need to think and decide if paying this amount a month is necessary and rational.