Obsolete Apple Products

Can anyone help with obsolete Apple products? It would be great if we can maintain a list of products getting obsolete year by year. Am currently facing issue with my Macbook Pro 2018 Model. Mac was not booting and so had to take to service center and seems have to replace the logic/mother board. But due to part unavailability am stuck to find a solution. Does anyone face similar issue and got any resolutions from Apple or local service centers in Kerala.