Not a buying guide — a framework for deciding what you actually need.
Match gear to what you actually shoot most. The most common gear mistake at this level isn't buying badly — it's buying generally, accumulating equipment for photography you rarely do. Before any purchase, honestly answer: what have you shot most in the last three months, and what specifically limited you?
Diminishing returns exist. A well-lit, well-composed photo from an older mid-range body outperforms a poorly-lit, poorly-composed shot from the newest flagship every time. Prioritize gear upgrades when a current limitation genuinely holds back your work — not on a general sense that newer is better.
Build a system, not a collection. Coherent choices (staying within one lens mount, choosing compatible accessories) compound in value over time — shared batteries, resale flexibility, lenses that adapt across future bodies. Opportunistic buying often produces gear that doesn't work well together even if each piece seemed reasonable alone.