In the meantime i started to think about if i should upgrade my T440s (i7-4600U, 8GB, 768GB SSD, FHD). It is old, but still going strong, and works perfectly with OBSD 7.2.
Now if i upgrade my hw, i would expect significant speed boost or better battery runtime, ideally both. But it feels like i should jump to at least to T/X470 with a 7th gen CPU or to a T/X480 with an 8th gen CPU and 16G RAM, FHD is mandatory, but better would be ideal. Thinkpads like this are readily available on the second-hand market in my country, but most of them are foreign ex-enterprise machines, therefore i will have to replace the keyboard. I also don't truest their SSD, so that would be needed aswell. Now counting all of this the resulting price feels just not really economical (600 EUR or so). I have money, i just don't feel like i want to pay that much for a machine. Can somebody give me a hint?