Shouldn't we take Lord Buddha's word above the all others?

I have seen many answers to questions referring teachings of modern teacher in this SE. *But as i have learned* Lord Buddha's understanding is above any other,even above an arahant. Dhamma/Dharma itself is timeless and therefore does not need modifications or updates. ----- So what is the need of the term "Modern practice / Modern Buddhism"? Shouldn't we take Lord Buddha's word above the rest and use any other resource later on for further clarification if there is such a need? Why there is a trend of drifting away from original teachings, does the followers now believe that Lord Buddha's words are outdated?