"the popular tech stack shifted": this says it all. Choice of a stack shouldn't be about popularity but rather about meeting the cultural,organizational,functional and non functional requirements of the solution. I said it already and I will continue saying it: our industry is driven more by fashion rather than good engineering practices. Every new trend solves a problem of the old generation but also introduces additional costs and new trade-offs. Adopting something blindly is not a good engineering approach. Software engineering is the art of balancing carefully your trade-offs and not to go with the latest fashion.