Your comparison is bad and you should know it. If they'd be complaining about their mobile phone bill being higher than their landline bill, fine - but that's

Your comparison is bad and you should know it. If they'd be complaining about their mobile phone bill being higher than their landline bill, fine - but that's not the case. I'm pretty sure the last land line phone my parents bought was under 100 bucks and it would still be working just fine 10 years later (that is in addition to the fact that we kinda transitioned from analog to ISDN around 2000, and then back). Compare to a new mobile phone every 3 years if you want security updates.