McCarthy's 4Ps concept is particularly suited to most consumer products. The model needs modifications for high-end consumer products, in which case relationship management is a factor. Services have some unique marketing issues to be factored into decision-making. Tactics for marketing industrial products should consider elements of long-term contractual agreements. Regardless of the modifications needed in some cases, the 4Ps remain a generally accepted marketing practice to influence buyers and its concepts still are espoused in contemporary textbooks. Further, the 4Ps marketing mix that McCarthy popularized has become a foundational and widely adopted marketing framework into the 21st century. This is partly due to the simplicity of the model, which makes it adaptable for changes in the marketing area, such as internet commerce. Rather than creating a new model, G. Dominic expressed that McCarthy's 4 Ps could be used with some "extension and adjustment" to develop tactics for the current, ever-changing marketing arena like internet commerce.