Loss of value Premium brands

Hello, I would have been interested in how you estimate the loss in value of premium brands in the years 4-6. After the future is clearly in electric mobility and now slowly the phase begins, where you could drive the last time an R6, V6 or even V8, I deal intensively with the question. For example, you can find a BMW 340i or a MB C43 AMG currently for about 38-45k Euro depending on the equipment. Most then have a mileage between 30,000 and 60,000 km. J Finally, I wonder how high the loss of value will usually be if you drive 15-20,000 km per year yourself. In addition, some wear parts will have to be replaced and repairs will be added. The last few years I have always leased and calculated costs, usually a maintenance package was also included. So I knew quite exactly what the car cost me per month. If I now put in 40,000 euros, the risk is completely with me. I realize that n iemand has a glass ball, but if I should only get 20,000 euros after 60000 km and in three years, then the monthly loss in value is already immense. In addition, there would be further investments for repairs and services etc. Have you already gained experience or should you just drive the car for more than three years?