I’m currently using a T470 [1] with 16 GB DDR-3 3200MHz RAM [2], a 2 TB NVMe SSD [3], a Wi-Fi 6AX card [4], the Innolux N140HCG-GQ2 1080p 100% sRGB 8-bit 400 nits panel [5] (based on the T14 / T490 display), and the Lenovo 61++ battery [6].
The result is a laptop that can hold 17 hours of battery (95Wh), supports a Thunderbolt 3 dock and the old Lenovo dock, supports USB-C PD charging and the old Lenovo charging port and is the perfect mix of performance, repairability, and compatibility.
You can build this laptop yourself, depending on how the pricing is where you are, for about 600 €.
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[1] https://www.afbshop.de/notebooks/20668/lenovo-thinkpad-t470-... [2] https://www.amazon.de/dp/B08LQG2SDS/ [3] https://www.amazon.de/dp/B07MLJD32L/ [4] https://www.amazon.de/dp/B087WVLPXW/ [5] https://www.xelent-store.de/Innolux-N140HCG-GQ2-400cd-Low-Po... [6] https://www.amazon.de/dp/B06WGMPFCD