The question is not about choosing one of two, but knowing where changes are allowed and where they are not.
For the core identity consisting of the logo, typeface, and primary color palette, choose sustainability as these elements are costly and painful to redo. Visual trends have their reasonable place, but that place is in easily changeable outer layers like campaign patterns, illustrations, and social media content. The wise approach is to establish a simple, clear, and long-lasting core, then let trends play in the outer layer that can change with the seasons.
For the core identity, Sinh Vũ's answer is always sustainability. Not because visual trends lack value, but because the core identity elements are the most expensive and painful to change: reprinting packaging, changing signage, updating all touchpoints (everywhere customers see the brand). Doing it right once, building on a clean foundation that lasts, will save much more than following trends and redoing it after a few years.
Sinh Vũ often explains to clients that the brand image is like the foundation of a house and the paint layer. The foundation must be solid and not change with the seasons. The paint layer can change color when wanting to refresh the space.
This separation allows the brand to appear fresh and keep up with market trends without having to change its core each time a trend shifts.
There are two cases that lean more towards trends than rationality.
For most other businesses, trends are campaign tools, not brand identity strategies.
Simple, clear, and flexible identity lasts longer than complex and trendy identity.
BrandCrowd, Logo Trends vs Timeless Design
Through many projects, what Sinh Vũ sees as the client's biggest pain is not that the identity looks unattractive, but when the core follows trends and then has to replace all touchpoints at once: signage, packaging, capability profiles, websites, uniforms. The cost and time are almost like starting over, while if the core is built correctly from the beginning, this step would not be necessary.
Sinh Vũ does not say that trends are bad. Sinh Vũ says that trends have their place, and that place is not in the logo or primary typeface. When you want your brand to look fresh, consider changing the outer layer before thinking about the foundation.
Topic: Should you follow visual trends or choose long-term sustainability. Sinh Vũ guide, sinhvu.com
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If you have marked most of the signs above, this is the time to discuss in more detail. Sinh Vũ can help you review and propose a direction.
BrandCrowd, Logo Trends vs Timeless Design; Tribu, Design Trends vs Timelessness; practical experience through projects by Sinh Vũ Studio.
Looking old and outdated are two different matters. If the logo is still clearly readable, consistent across touchpoints, and distinguishable from competitors, there is no need to change the core. You can refresh the brand's feel by changing the outer layer, such as patterns, images, and secondary colors in the campaign before deciding to redo everything.
Flexibility at the outer layer is completely correct. However, flexibility at the core often leads to a loss of identity rather than being more modern. In a fast-changing industry, a better solution is to build a core that is simple and neutral enough not to become outdated over time, while allowing the campaign part to keep up with trends.
The simple principle is to ask whether the effect will still be valid in five years. Subtle gradients, clean lines, or classic fonts tend to last longer. Prominent 3D effects, complex shadows, or trendy fonts on social media usually do not. If you cannot answer that question, Sinh Vũ recommends keeping the core intact and playing with trends elsewhere.