Until the 1960's the consumption of port wine was higher than table wine, but since that date Port styles have become much less popular. This decline in popularity is worldwide.
For more about Port wine and Portuguese grape varieties see this book The Wine and Food Lover's Guide to Portugal
Several of the varieties used for port wine are very suitable for table wine production, either alone or in blends. There is now quite a trend in the Douro Valley, the home of Port wine, to switch production from making fortified wines to table wines. This same trend has been evident in Australia as well.
full of rich dark fruit spiced by notes of cinnamon and clove supported by rounded tannins...
These are the flavours you can expect in this variety according to Jancis Robinson's Wine Grapes
Wines made from this variety have good rich colour and a tea-like aroma.
A few wineries use the Trincadeira wine grape variety to make a varietal wine but it is more often used to add colour and another layer of flavour to blended wines.
Trincadeira is one of the 184 wine grape varieties that feature on the De Long Grape Varietal Table