I have to politely disagree. If you ever run a website for business/portfolio etc. the number of people more likely to contact you using a contact form is far greater than just telling them to email you. Contact forms also scale well if you need to categorize and channel the queries to different people or need more specific info.
Fair enough. I would argue that we're probably talking about different use cases. If you're at the stage of categorising and channelling queries to different people, your site is probably already "heavyweight" enough to justify a backend anyway.
