Pickover in his recent book ';The Math Book'; says Roman numerals aren't used any more. Is it true they aren't ?

The only place Roman numerals are used are for copyrighting the European movies. And crosswords.Pickover in his recent book ';The Math Book'; says Roman numerals aren't used any more. Is it true they aren't ?
They were used in the 1970s. I know because SingerLibrascope company used them to number the preface of a document. A customer representative asked that the document be amended so as to write the page numbers in ';ordinary'; numbers, so this was done.