You're really not old until you reach 80's where stuff like cognitive decline and frailty are more likely to start showing up.
I use to think 40's was old when i was younger, but if you think about it you have another 40 some odd years until your old. Thats way longer than most companies, marriages, careers etc last.
Unless your Northern Europe is Kaliningrad or somewhere else in Russia, 76 is the average life expectancy for men and at birth (that's in the Baltics, the rest of Northern Europe has higher life expectancy than that at birth). Life expectancy is much higher than that at 50 or 60, and also higher for women.
Generally, in the Northern and Western Europe I know, people with a "normal" life without special health problems don't seem very old at 60 or 70, and they expect to live to around 80 or more.
Even in the US which is notorious for low life expectancy among OECD nations, the average age of death (from a quick Google search) seems to be 85[0].
[0]https://qph.cf2.quoracdn.net/main-qimg-45a57c5080b55f9bd5313... (no source, date, or anything for this data)
Of course frailty is also subjective and relative. It’s why everyone seems old compared to their prior self, and yet equally seems young compared to your elders.
Interestingly, for 30 year olds, it's average death at 73 for men and 81 for women.