I don’t know anyone that isn’t my parents age that has a landline anymore so this scenario already wouldn’t work with my friends, family or neighbours. My phone isn’t directly tied to my address in any way that might be useful for emergency services.

A true landline, very few people. But setting up a cheap VOIP line is not very expensive on a month-to-month basis, and it's useful to have a phone number that you can give to any person or business that can't bother you at work. We have poor cell service at my house, so the VOIP line is my preference for most calls at home.

Depends on where you live. In Sweden your cell phone is typically tied to yourself and yourself to your primary place of stay.

Sure, that's why I said that mine isn't. I know that's not the case for everyone, but it is for me and many people I know, at least. Its obviously not the case for everyone, many people will have a phone tied to an address, but many people also don't. My phone is tied to me, but whether or not the provider has an address depends on if I have a bill phone or not (many people here do not).

I also wonder EU countries, including Sweden, would actually allow telecom providers to share that information with other parties such as emergency services or whether that would be against data protection laws.

Besides, prior to the pandemic, there was also a high likelihood that I wouldn't be at home, if you called me on a random day at a random time, so even if my phone were tied to my address, it wouldn't be a good idea for emergency services to rely on that.

The one time my neighbors called for help (their car wouldn't start and they needed to go to urgent care), they txt'ed first, then called. Though I would have picked up when they called (and it would have gotten through my do not disturb settings) because their number is in my contacts.

Not saying that your neighbor would call you, but that the emergency services would call you on your neighbours behalf (and it will not be from a number you recognize).

I've never heard of that happening, but yeah, if the neighbor calls 911, and then EMS calls me for some reason, I'm not going to answer since 99% of the time it's a spammer.

If they leave a voicemail, I'll get a transcript.

I have lost track of how many times I have told people: just because you hear a phone ringing on your end, doesn't mean it's ringing on my end. (Verizon US, and yes, you as a caller will hear ringing while my phone sits silent.) Leave a voicemail. It can be short, it can be almost devoid of meaning, but if you send it, I will at least know that you called. If you don't? No record at all. I was out of range, you left nothing to be tracked by...