Few months ago I've published a short article about what is a Model Debt & why it matters. Today I'd like to provide you with two nice, crispy examples that illustrate the idea. Both are coming from the Domain I currently work on with my teams - booking appointments in Beauty & Wellness industry. Booking an appointment initially was very straightforward. Apart from knowing what (particular service) you were booking & whom (which stylist) you were booking, the only challenge was to make sure that no-one has booked the same time-slot (of a given stylist). We've achieved it in the…