@Tido I've cycled the micro-USB on my tinkerboard hundreds (if not over a thousand) times, the resistance has increased, making it more susceptible to power issues, but nothing has broken. Same for my "S". In a static situation where the user is going to set it up and leave it with a switch (official Tinker supply, loverpi supply, etc), I don't think this is a real concern. For a hardware tinkerer, yes.