WordPress: content-led business sites
WordPress was released in 2003 as an open-source CMS and is now used widely for business websites, blogs, and brochure-style sites. It supports themes, plugins, SEO tooling, and custom development, so it can be extended well beyond its defaults. For Singapore SMEs that need frequent content updates and lower maintenance complexity, it is a common choice.
The trade-off is plugin dependency. A site built on many third-party plugins needs those plugins updated and occasionally replaced. Keep the plugin list short and well understood.