That is correct. Some historical context is much appreciated in this thread.
> tl;dr on Section 174, Research & Experimentation costs went from being fully deductible in the year incurred to being deductible over a 5 year period.
Larger tax bills and a tightening on what roles/activities are deductible as R&E are likely what OP is pointing at with his comment.
To the best of my non-inside baseball research, Section 174 changes were simply one part of a package of revenue generating measures to offset the large tax cuts from the broader tax act they were a part of.
The changes came from The Tax Cuts & Jobs Act of 2017 that was introduced to the House of Representatives by Congressman Kevin Brady (R) Texas. The bill passed both houses of Congress along party lines. Then President Trump signed the bill into law. Section 174 changes did not take effect until 2021.
Now Trump second round fixes it, but expires in next (presumably) Democrat administration.