As a kid in the 80s, I had some things from Germany and their quality was astounding. Fast forward to present time, our Volkswagen car made in Germany is the worst car I've ever had in terms of reliability.
PS: an honest question getting downvotes?
Miele once built washing machines that outlast 30 years. They offered spare parts and regional service hubs. But the market decided to just buy the 50% cheaper ones every 5 years.
Which is why back in the day, there were some car/washing machine/tool brands and models that seemed to last forever. Whereas now the current models last exactly their warranty/leasing period.
Edit: Other manufacturers do this, too. But for them, it's often coming from the other side of the reliability curve, so they are improving, the ones that were better back then are getting worse.
Many German manufacturers (esp. the "premium" ones) don't build for people. They build mostly cars that get leased as company cars. So price isn't that much of an issue, longevity beyond the 4 year leasing term isn't a problem, excessive maintenance isn't a problem since it'll be included in the lease. Oh, and the trunk is just for a laptop bag and the overnight clothes for that one passenger anyways, so nobody cares it's impractically small.
Also, from what I know, design cycles for German cars are relatively long. A model won't just be changed, at least not once per year (as USians seem to expect to the dismay of German manufacturers). While this is great for cost-optimizing the manufacturing process and might be nice because replacement parts are easier to find, this has a downside: Japanese car makers practice continuous improvement, meaning that a change can go in at any time, as long as it seems advantageous. So maybe they learn more quickly from their past mistakes and overall build a more solid engineering experience through this continuous fiddling...
German engineering culture is to think things through. To take everything into account. To do it properly, and not mess around. To rather think a bit more and make sure you get everything right.
Basically very similar to German rules culture.
Problem is, both of these cultures have their downsides as well. Rules as well as plans get overengineered. The belief that "one more rule can't hurt". The belief that "taking a step back yet again and discussing it a bit more is always worth it". At some point, you get stuck in a maze of rules, contradictory plans, meetings over meetings with no action. Engineers are scared to invent and engineer, because there surely will be some rule that could be violated...